# Enhancer Sequences: Function, Mechanism, and Examples

## Introduction to Enhancer Sequences

### Definition and Basic Characteristics

An enhancer sequence is a short region of DNA, typically 100–1000 base pairs in length, that can be bound by specific proteins called [transcription factors](/knowledge/molecular-biology/transcription-factor) to increase the rate of transcription of a target gene. Unlike promoter sequences, which are located immediately adjacent to the transcription start site (TSS), enhancers can be positioned thousands of base pairs away—either upstream, downstream, or even within introns of the genes they regulate. This positional flexibility is a defining feature of enhancer function.

Enhancers are *cis*-acting elements, meaning they exert their effect only on genes located on the same DNA molecule. They do not encode proteins or functional RNA molecules; their function is entirely dependent on the proteins that bind to them. A typical enhancer contains multiple binding sites for different transcription factors, and it is the combinatorial occupancy of these sites that determines the enhancer's activity in a given cell type or condition.

### Historical Discovery

The concept of the enhancer emerged from studies of the SV40 virus in the early 1980s. Researchers led by Walter Schaffner and Pierre Chambon independently demonstrated that a 72-base-pair repeated sequence from the SV40 genome could dramatically increase transcription of a linked reporter gene (the β-globin gene) when introduced into mammalian cells. Critically, this activation occurred even when the sequence was placed thousands of base pairs away from the promoter, and it worked in either orientation. This landmark finding overturned the prevailing view that gene regulation was mediated solely by promoter-proximal elements and established the enhancer as a distinct class of regulatory DNA.

## The Function of Enhancer Sequences in Eukaryotes

### Activation of [Gene Expression](/blog/guides/gene-expression)

The primary function of an enhancer sequence is to increase the transcriptional output of a target gene, often by several orders of magnitude. In the absence of enhancer activity, many genes exhibit only basal or undetectable levels of transcription. Enhancers achieve this by serving as platforms for the assembly of large protein complexes that ultimately recruit and stabilize the general transcription machinery at the promoter.

The magnitude of enhancer-mediated activation is substantial. For example, the β-globin locus control region (LCR), a cluster of enhancer elements, is required to achieve the high-level, erythroid-specific expression of the β-globin gene. Without the LCR, β-globin expression drops to less than 1% of normal levels, resulting in severe thalassemia. This illustrates that enhancers are not merely modulatory; they are often essential for achieving physiologically relevant levels of gene expression.

Enhancers can act over remarkable distances. The *SHH* (Sonic hedgehog) gene, for instance, is regulated by an enhancer located approximately 1 megabase (1,000,000 base pairs) upstream of its promoter within an intron of another gene (*LMBR1*). This long-range regulation is made possible by the three-dimensional folding of chromatin, which brings the enhancer into physical proximity with its target promoter.

### Cell-Type Specificity

One of the most important functions of enhancers is conferring cell-type-specific gene expression. The human genome contains an estimated 400,000 to 1 million putative enhancer sequences, far exceeding the approximately 20,000 protein-coding genes. Many of these enhancers are active only in specific cell types, developmental stages, or in response to specific signals.

This specificity arises from the fact that enhancer activity depends on the presence of the appropriate transcription factors. A given enhancer will only be functional in a cell that expresses the specific combination of transcription factors that can bind to its sequence. For example, the albumin enhancer is active only in hepatocytes because it requires liver-enriched transcription factors such as HNF1, HNF3, and C/EBP. In a fibroblast, which lacks these factors, the enhancer remains inactive even though the sequence is present in the genome.

This logic underlies much of cellular differentiation. During development, cascades of [transcription factor](/knowledge/molecular-biology/transcription-factor) expression progressively activate cell-type-specific enhancers, locking in particular gene expression programs. The importance of this mechanism is underscored by the observation that many disease-associated single nucleotide polymorphisms (SNPs) identified by genome-wide association studies (GWAS) fall within enhancer sequences rather than within protein-coding regions.

## Mechanism of Enhancer Action

### Transcription Factor Binding

The first step in enhancer function is the sequence-specific binding of transcription factors. These proteins recognize short DNA motifs, typically 6–12 base pairs in length, within the enhancer. A single enhancer typically contains binding sites for 5–15 different transcription factors, and it is the specific combination of bound factors—not any single factor—that determines enhancer activity.

Transcription factors bind to DNA through structural motifs such as zinc fingers, helix-turn-helix domains, or basic leucine zippers. The binding affinity of an individual factor for its site is often moderate (dissociation constants in the nanomolar to micromolar range), and occupancy is influenced by the local chromatin environment. Pioneer transcription factors, such as FOXA1 and OCT4, have the special ability to bind to nucleosomal DNA and initiate the opening of closed chromatin, making way for other factors to bind.

The cooperative binding of multiple transcription factors is a critical feature of enhancer function. Once one factor binds, it can recruit additional factors through protein-protein interactions, increasing their local concentration and facilitating their binding to adjacent sites. This cooperativity ensures that enhancer activation is switch-like rather than graded, and it provides a mechanism for integrating multiple signaling inputs.

### DNA Looping and 3D Genome Organization

Enhancers can act over long linear distances because the intervening DNA is looped out, bringing the enhancer into close physical proximity with its target promoter. This looping is mediated by protein complexes, most notably the cohesin complex and the CTCF (CCCTC-binding factor) protein.

The prevailing model, known as the loop extrusion model, proposes that cohesin forms a ring-like structure that actively extrudes DNA through its central pore until it encounters CTCF-bound boundary elements. This process creates chromatin loops that bring enhancers and promoters into contact. The architectural protein CTCF binds to specific DNA sequences and, together with cohesin, defines the boundaries of topologically associating domains (TADs)—regions of the genome that preferentially interact with themselves.

Within a TAD, enhancers can freely contact their target promoters. However, enhancers rarely act across TAD boundaries, which helps ensure that an enhancer regulates the correct gene and not a neighboring gene in a different domain. Disruption of TAD boundaries can lead to inappropriate enhancer-promoter interactions and has been implicated in developmental disorders and cancer. For example, mutations that delete a TAD boundary near the *EPHA4* gene cause ectopic activation of the *WNT6* gene by an enhancer that normally regulates *EPHA4*, leading to limb malformations.

The physical interaction between enhancer and promoter can be detected using techniques such as chromosome conformation capture (3C) and its high-throughput derivatives (Hi-C, Capture-C). These methods have confirmed that active enhancers are in close spatial proximity to their target promoters in the nucleus, even when separated by large linear distances.

### Recruitment of the Transcription Machinery

Once the enhancer is brought into proximity with the promoter, the transcription factors bound at the enhancer recruit coactivator proteins that facilitate [transcription initiation](/knowledge/molecular-biology/transcription-initiation). The most important of these coactivators is the Mediator complex, a large multi-subunit complex (26 subunits in humans) that bridges enhancer-bound transcription factors and the RNA polymerase II (Pol II) machinery at the promoter.

The sequence of events is as follows:

1. Transcription factors bind to the enhancer sequence.
2. These factors recruit coactivators, including Mediator and histone acetyltransferases (HATs) such as p300/CBP.
3. HATs acetylate histone tails, particularly on lysine 27 of histone H3 (H3K27ac), which is a hallmark of active enhancers. This acetylation neutralizes the positive charge on histones, loosening their interaction with DNA and making the chromatin more accessible.
4. Mediator interacts with the preinitiation complex (PIC) at the promoter, which includes Pol II and general transcription factors (TFIIA, TFIIB, TFIID, TFIIE, TFIIF, TFIIH).
5. TFIIH, which contains a kinase subunit (CDK7), phosphorylates the C-terminal domain (CTD) of Pol II at serine 5, triggering promoter escape and [transcription initiation](/knowledge/molecular-biology/transcription-initiation).
6. Additional phosphorylation events, including serine 2 phosphorylation by the kinase P-TEFb (CDK9/cyclin T1), promote transcriptional elongation.

This recruitment process is highly dynamic. Live-cell imaging studies have shown that enhancer-promoter contacts are transient, lasting only seconds to minutes, and that transcription occurs in bursts. The enhancer increases the frequency and duration of these bursts, thereby increasing overall transcript levels.

## Enhancer Structure and Features

### Binding Site Clusters

The most fundamental structural feature of an enhancer is the presence of clustered transcription factor binding sites. These clusters are typically 100–1000 base pairs in length and contain multiple, often overlapping, recognition motifs. The density of binding sites is what distinguishes an enhancer from a promoter, which contains a more defined arrangement of core promoter elements (TATA box, Initiator, downstream promoter element).

The clustering of binding sites is functionally important because it enables cooperative binding and signal integration. For example, the interferon-β (IFN-β) enhancer, one of the best-characterized enhancers, contains binding sites for NF-κB, IRF (interferon regulatory factor), and ATF-2/c-Jun. All three factors must bind simultaneously for the enhancer to be active. This "enhanceosome" model, in which a precisely arranged complex of factors assembles on the enhancer, contrasts with the more flexible "billboard" model, in which factors bind independently and additively. Both modes of regulation exist in nature.

### Orientation and Distance Independence

A defining property of enhancers is that they function independently of orientation. If an enhancer is reversed (flipped 180 degrees relative to the gene), it still enhances transcription. This is because the DNA sequence is read by transcription factors in a directional manner, but the enhancer complex as a whole interacts with the promoter through looping, which is orientation-independent.

Similarly, enhancers function over variable distances. They can be located immediately upstream of a promoter, within an intron, downstream of the gene, or even within the coding sequence of an unrelated gene. The only requirement is that the enhancer and promoter are brought into proximity through chromatin looping. This distance independence is a key distinction from promoter-proximal regulatory elements, which must be located within a few hundred base pairs of the TSS.

### Epigenetic Marks

Active enhancers are characterized by specific histone modifications and chromatin features that distinguish them from inactive enhancers and from promoters. These marks are useful both for understanding enhancer biology and for identifying enhancers experimentally.

| Feature | Active Enhancer | Inactive/Poised Enhancer | Promoter |
|---------|-----------------|--------------------------|----------|
| H3K4me1 | High | High | Low |
| H3K4me3 | Low | Low | High |
| H3K27ac | High | Low | High |
| DNA accessibility | High | Low | High |
| p300/CBP binding | Yes | No | Variable |
| eRNA transcription | Yes | No | No |

The monomethylation of histone H3 at lysine 4 (H3K4me1) is a hallmark of enhancer sequences, whether active or poised. The addition of acetylation at lysine 27 (H3K27ac) distinguishes active enhancers from poised or primed enhancers. Active enhancers are also transcribed to produce short, non-coding RNAs called enhancer RNAs (eRNAs), which are typically 0.5–2 kb in length and may play a role in stabilizing enhancer-promoter interactions.

DNA accessibility, as measured by sensitivity to DNase I digestion or by ATAC-seq (Assay for Transposase-Accessible Chromatin using sequencing), is another defining feature. Active enhancers are nucleosome-depleted, allowing transcription factors to access their binding sites. This accessibility is established by pioneer transcription factors and maintained by the continuous binding of activating factors.

## Methods to Identify and Study Enhancers

### Chromatin Profiling

The identification of enhancer sequences on a genome-wide scale relies heavily on chromatin profiling techniques. The most widely used approach combines ChIP-seq (chromatin immunoprecipitation followed by sequencing) for histone modifications and coactivator proteins with assays for DNA accessibility.

A typical enhancer identification pipeline involves:

1. Perform ChIP-seq for H3K4me1, H3K27ac, and the coactivator p300 in the cell type of interest.
2. Perform ATAC-seq or DNase-seq to identify regions of open chromatin.
3. Identify regions that are enriched for H3K4me1 and H3K27ac, bound by p300, and accessible to transposase/DNase.
4. Exclude promoter regions (defined by H3K4me3 enrichment and proximity to annotated TSSs).
5. Validate candidate enhancers using reporter assays or CRISPR-based perturbation.

ChIP-seq involves crosslinking proteins to DNA with formaldehyde, shearing the chromatin by sonication to fragments of approximately 200–600 base pairs, immunoprecipitating with an antibody against the protein of interest, reversing the crosslinks, and sequencing the enriched DNA fragments. ATAC-seq uses the hyperactive Tn5 transposase to simultaneously fragment and tag accessible chromatin regions, which are then sequenced.

### Reporter Gene Assays

Reporter assays provide functional validation of enhancer activity. In a typical enhancer reporter assay, the candidate sequence is cloned upstream or downstream of a minimal promoter (containing only a TATA box and transcription start site) driving a reporter gene such as luciferase, GFP, or β-galactosidase. The construct is then introduced into cells, and reporter activity is measured.

For the luciferase assay, cells are lysed 24–48 hours after transfection, and the lysate is mixed with the substrate luciferin in the presence of ATP and magnesium. Light emission is measured with a luminometer, and the signal is normalized to a control reporter (e.g., Renilla luciferase) to control for transfection efficiency. A candidate enhancer should increase reporter activity by at least 5- to 10-fold compared to the minimal promoter alone.

More sophisticated approaches, such as STARR-seq (Self-Transcribing Active Regulatory Region sequencing), allow high-throughput screening of millions of candidate enhancer sequences in a single experiment. In STARR-seq, candidate DNA fragments are cloned downstream of a promoter such that the enhancer sequence itself is transcribed into the reporter mRNA. Active enhancers produce more mRNA, which is quantified by sequencing.

### Enhancer Disruption

The gold standard for demonstrating that an endogenous enhancer is required for gene expression is to disrupt it in its native genomic context. The CRISPR/Cas9 system has made this approach routine. A guide RNA (gRNA) is designed to target the enhancer sequence, and Cas9 introduces a double-strand break that is repaired by non-homologous end joining (NHEJ), creating a small insertion or deletion (indel) that disrupts the enhancer.

The effects of enhancer disruption can be assessed by measuring target gene expression by RT-qPCR or RNA-seq. For example, deletion of a 200-base-pair [enhancer region](/knowledge/molecular-biology/enhancer-region) might reduce target gene expression by 80–90%, confirming its functional importance. More precise approaches use CRISPR to introduce point mutations in specific transcription factor binding sites, allowing the contribution of individual sites to be assessed.

## Enhancer Sequence Examples

### Beta-Globin Locus Control Region

The β-globin locus control region (LCR) is one of the most extensively studied enhancer systems. Located upstream of the β-globin gene cluster on chromosome 11, the LCR consists of five DNase I hypersensitive sites (HS1–HS5) spread over approximately 20 kilobases. These sites contain clusters of binding sites for erythroid-specific transcription factors, including GATA1, NF-E2, and KLF1.

The LCR is required for high-level expression of all five β-like globin genes (ε, Gγ, Aγ, δ, and β) during development. It functions by looping to the active globin gene promoter, bringing the enhancer into proximity with the transcription machinery. The LCR also establishes an open chromatin domain, making the entire locus accessible to transcription factors.

Mutations that delete the LCR or its critical HS2 and HS3 elements result in β-thalassemia, a severe anemia caused by reduced or absent β-globin expression. This clinical consequence underscores the essential role of enhancers in achieving physiologically adequate gene expression.

### Sonic Hedgehog (SHH) Enhancer

The *SHH* gene, which encodes a secreted signaling protein critical for embryonic patterning, is regulated by multiple tissue-specific enhancers. The best-characterized is the ZRS (ZPA Regulatory Sequence), located approximately 1 megabase upstream of the *SHH* promoter within an intron of the *LMBR1* gene.

The ZRS is approximately 800 base pairs in length and is specifically active in the zone of polarizing activity (ZPA) of the developing limb bud. It contains binding sites for several transcription factors, including HOXD13, ETV4/5, and HAND2, which are expressed in the posterior limb bud mesenchyme. The ZRS loops over the intervening 1 megabase of DNA to contact the *SHH* promoter, driving expression specifically in the ZPA.

Point mutations in the ZRS cause preaxial polydactyly (extra digits) in humans, mice, and even cats. These mutations create novel binding sites for transcription factors that are expressed elsewhere in the limb bud, causing ectopic *SHH* expression and disrupting normal digit patterning. This example illustrates how enhancer mutations can cause disease by altering the spatial pattern of gene expression.

## Enhancers vs. Promoters

### Key Differences

Enhancers and promoters are both cis-acting regulatory elements, but they differ in several fundamental respects. The table below summarizes the key differences:

| Feature | Enhancer | Promoter |
|---------|----------|----------|
| Position | Variable: upstream, downstream, intronic, intergenic | Immediately upstream of TSS (within ~100 bp) |
| Orientation | Orientation-independent | Directional (defines transcription direction) |
| Distance to gene | Can be >1 Mb | Adjacent to TSS |
| Core elements | Transcription factor binding site clusters | TATA box, Initiator, DPE, BRE |
| Histone marks | H3K4me1, H3K27ac | H3K4me3, H3K27ac |
| Function | Increases transcription rate | Defines TSS and assembles PIC |
| Transcription | Produces eRNAs (bidirectional) | Produces mRNA (unidirectional) |

The [Difference Between Enhancer and Promoter](/knowledge/molecular-biology/difference-between-enhancer-and-promoter) is a frequent exam topic, and understanding these distinctions is essential. Promoters are the sites where RNA polymerase II binds and initiates transcription. They contain core promoter elements that position the PIC and determine the TSS. Enhancers, by contrast, are regulatory elements that modulate the activity of promoters from a distance.

### Promoter-Enhancer Interactions

Despite their differences, enhancers and promoters are functionally interdependent. An enhancer has no intrinsic transcriptional activity; it can only stimulate a promoter. Conversely, most promoters require enhancer input to achieve significant levels of transcription.

The interaction between enhancers and promoters is mediated by the looping mechanisms described earlier. Interestingly, some promoters are more responsive to enhancers than others. Promoters that contain a TATA box and are enriched for H3K4me3 tend to be more enhancer-responsive than CpG island promoters, which are often constitutively active. This differential responsiveness may help explain why some genes are highly tissue-specific while others are broadly expressed.

Recent work has also revealed that many promoters can themselves act as enhancers for other genes. This "promoter-enhancer" duality suggests that the distinction between these elements is not absolute but exists on a continuum. The [Enhancer Region](/knowledge/molecular-biology/enhancer-region) concept encompasses this functional flexibility.

## Common Pitfalls and Misconceptions

### Misconception: Enhancers Are Always Upstream

A common error is to assume that enhancers are always located 5' (upstream) of the gene they regulate. In reality, enhancers can be located anywhere relative to their target gene: upstream, downstream, within introns, or even within the coding sequence of neighboring genes. The *SHH* ZRS enhancer is located 1 Mb upstream, but many enhancers are found downstream or within gene bodies. The only requirement is that the enhancer and promoter are brought into proximity by chromatin looping.

### Misconception: Enhancers Work Only in Close Proximity

Students often assume that enhancers must be near the gene they regulate. While some enhancers are indeed close (within a few hundred base pairs), many act over distances of tens to hundreds of kilobases, and some act over megabase distances. The linear distance is irrelevant because the three-dimensional folding of chromatin brings distant sequences together. This is why chromosome conformation capture techniques are essential for linking enhancers to their target genes.

### Misconception: Enhancers Are Not Cell-Type Specific

Another misconception is that an enhancer, once identified, is active in all cell types. In fact, most enhancers are highly cell-type-specific. An enhancer is only active in cells that contain the appropriate combination of transcription factors. The same enhancer sequence may be inactive in a different cell type because the required factors are absent. This cell-type specificity is the basis for the tissue-specific expression patterns of most genes.

### Misconception: Enhancers Always Increase Transcription

While enhancers are defined by their ability to increase transcription, some elements called "silencers" decrease transcription. Silencers are mechanistically similar to enhancers—they bind transcription factors and loop to promoters—but the factors they recruit are repressors rather than activators. Additionally, some enhancers can act as silencers in certain contexts, depending on the bound factors. The distinction between [enhancers and silencers](/knowledge/molecular-biology/enhancer-and-silencer) is therefore context-dependent.

### Misconception: All Conserved Non-Coding Sequences Are Enhancers

Evolutionary conservation is often used to identify candidate enhancers, but not all conserved non-coding sequences are enhancers. Many conserved elements are other types of regulatory DNA, such as insulators, silencers, or matrix attachment regions. Conversely, many functional enhancers are not conserved across species, having evolved recently. Functional validation is always required to confirm enhancer activity.

## Frequently Asked Questions

### What is an enhancer sequence?

An enhancer sequence is a short region of DNA, typically 100–1000 base pairs, that binds transcription factors and increases the transcription of a target gene. Enhancers are cis-acting, meaning they only affect genes on the same DNA molecule, and they can act over long distances by looping to the promoter.

### What is the function of enhancer sequences in eukaryotes?

Enhancers increase the rate of transcription of target genes, often by several orders of magnitude. They are essential for achieving high-level gene expression and for conferring cell-type-specific expression patterns. Enhancers integrate signals from multiple transcription factors and recruit coactivators that facilitate RNA polymerase II activity.

### Can you give an enhancer sequence example?

The β-globin locus control region (LCR) is a well-studied enhancer cluster required for high-level expression of β-globin genes in red blood cells. Another example is the ZRS enhancer that regulates Sonic hedgehog (*SHH*) expression in the developing limb bud. Mutations in the ZRS cause preaxial polydactyly.

### How do enhancers work?

Enhancers work through a multi-step mechanism: (1) transcription factors bind to specific sequences within the enhancer, (2) the enhancer is brought into proximity with its target promoter through DNA looping mediated by cohesin and CTCF, (3) coactivators such as Mediator and p300 are recruited, and (4) these coactivators facilitate the assembly of the preinitiation complex and phosphorylation of RNA polymerase II, leading to transcription initiation.

### Are enhancers always located upstream of the gene?

No. Enhancers can be located upstream, downstream, within introns, or even within the coding regions of other genes. Their position relative to the target gene is highly variable, and their function depends on three-dimensional proximity rather than linear distance.

### Do enhancers work in prokaryotes?

Classical enhancer elements are primarily a eukaryotic feature. However, prokaryotes have regulatory elements that function similarly, such as the enhancer-like elements that bind NtrC and other bacterial enhancer-binding proteins (bEBPs). These proteins activate σ54-dependent promoters from distant sites by looping DNA, analogous to eukaryotic enhancer function.

### How are enhancers identified experimentally?

Enhancers are identified using a combination of approaches: chromatin profiling (ChIP-seq for H3K4me1, H3K27ac, p300), accessibility assays (ATAC-seq, DNase-seq), reporter gene assays (luciferase, GFP), and functional perturbation (CRISPR/Cas9 deletion). High-throughput methods such as STARR-seq allow genome-wide screening of enhancer activity.

### What is the difference between an enhancer and a promoter?

A promoter is located immediately upstream of the transcription start site and directs the initiation of transcription by RNA polymerase II. An enhancer is a distal regulatory element that increases promoter activity from a distance. Promoters are directional and define the TSS, while enhancers are orientation-independent and can act over long distances. See the [Difference Between Enhancer and Promoter](/knowledge/molecular-biology/difference-between-enhancer-and-promoter) for a detailed comparison.

## Key Takeaways

- Enhancer sequences are cis-acting DNA elements that increase transcription of target genes by binding transcription factors and looping to promoters.
- Enhancers can be located far from their target genes—upstream, downstream, or within introns—and function in an orientation-independent manner.
- The mechanism of enhancer action involves transcription factor binding, DNA looping mediated by cohesin and CTCF, and recruitment of coactivators such as Mediator and p300 to the promoter.
- Active enhancers are marked by H3K4me1 and H3K27ac, are accessible to nucleases, and produce enhancer RNAs (eRNAs).
- Enhancers confer cell-type-specific gene expression because their activity depends on the presence of specific transcription factors in a given cell.
- Enhancers are identified using ChIP-seq, ATAC-seq, reporter assays, and CRISPR-based perturbation, and validated by measuring effects on target gene expression.
- Well-studied examples include the β-globin locus control region and the SHH ZRS enhancer, both of which are clinically significant when mutated.

## Further Reading

- Kalsheker NA, Morgan K. *Regulation of the alpha 1-antitrypsin gene and a disease-associated mutation in a related enhancer sequence*. American journal of respiratory and critical care medicine. 1994. [PubMed 7952657](https://doi.org/10.1164/ajrccm/150.6_Pt_2.S183)
- Phillips R. *Enhancer sequence identified as target in SLE*. Nature reviews. Rheumatology. 2023. [PubMed 37853233](https://doi.org/10.1038/s41584-023-01047-8)
- Lawler AJ et al. *Machine learning sequence prioritization for cell type-specific enhancer design*. eLife. 2022. [PubMed 35576146](https://doi.org/10.7554/eLife.69571)
- Viola MG et al. *An enhancer sequence in the intrinsically disordered region of FtsZ promotes polymer-guided substrate processing by ClpXP protease*. Protein science : a publication of the Protein Society. 2022. [PubMed 35481648](https://doi.org/10.1002/pro.4306)
- Zhang Q et al. *Comparative sequence analysis and functional validation identified a retina-specific enhancer around zic5 and zic2a*. Gene expression patterns : GEP. 2021. [PubMed 33359848](https://doi.org/10.1016/j.gep.2020.119162)
- Dibaeinia P, Sinha S. *Deciphering enhancer sequence using thermodynamics-based models and convolutional neural networks*. [Nucleic acids research](/blog/news/nucleic-acids-research). 2021. [PubMed 34508359](https://doi.org/10.1093/nar/gkab765)

## Related Topics

- [Promoter Sequence](/knowledge/molecular-biology/promoter-sequence)
- [Enhancer Testing](/knowledge/molecular-biology/enhancer-testing)
- [Cognitive Enhancer](/knowledge/molecular-biology/cognitive-enhancer)
- [Enhancer in Transcription](/knowledge/molecular-biology/enhancer-in-transcription)


<div data-calculator="molecular-cloning"></div>

## Related Clinical & Scientific Guides

* [MAPK Pathway: Mechanism, Function, and Clinical Relevance](/knowledge/molecular-biology/mapk-pathway)
* [Mammalian Cell Culture Bioreactors: A Practical Guide](/knowledge/molecular-biology/mammalian-cell-culture-bioreactor)
* [Nucleotide Formation: Biosynthesis and Assembly of DNA/RNA Building Blocks](/knowledge/molecular-biology/nucleotide-formation)