rRNA Degradation: Mechanisms, Regulation, and Cellular Significance

By Dr. Zubair Khalid, DVM, MS, PhD · 2026-08-11

Introduction to rRNA Degradation

Ribosomal RNA (rRNA) constitutes approximately 80–90% of total cellular RNA and forms the structural and catalytic core of ribosomes, the molecular machines responsible for protein synthesis. In a typical mammalian cell, rRNA is present at roughly 10⁷ copies per cell, and its synthesis accounts for a substantial fraction of cellular energy expenditure. Given this abundance and metabolic cost, the regulated degradation of rRNA is a critical but often underappreciated aspect of RNA biology. rRNA degradation refers to the enzymatic breakdown of ribosomal RNA molecules, either as part of normal ribosome turnover, as a quality control mechanism for defective ribosomes, or as a programmed response to cellular stress.

The term rRNA decay is often used interchangeably with rRNA degradation, though "decay" typically emphasizes the exonucleolytic trimming of RNA fragments, while "degradation" encompasses both endonucleolytic cleavage and subsequent processing. A specialized form of rRNA degradation, ribophagy, describes the selective autophagic engulfment and lysosomal destruction of entire ribosomes. This process is distinct from the general RNA decay machinery that operates in the cytoplasm and nucleus.

What is rRNA Degradation?

rRNA degradation is the process by which ribosomal RNA molecules are cleaved and digested into nucleotides. Unlike messenger RNA (mRNA), which has a short half-life measured in minutes to hours, rRNA is remarkably stable under normal growth conditions, with half-lives ranging from several days in proliferating cells to weeks in quiescent tissues. This stability reflects both the protective structure of the ribosome—where rRNA is tightly associated with ribosomal proteins—and the active suppression of rRNA decay pathways under favorable growth conditions.

When rRNA degradation does occur, it proceeds through two fundamentally different routes. The first involves the general RNA decay machinery, including exonucleases and endonucleases that recognize rRNA as a substrate when ribosomes are damaged, stalled, or otherwise marked for destruction. The second route involves autophagy, specifically ribophagy, where entire ribosomes are delivered to lysosomes or vacuoles for bulk degradation. Both pathways converge on the same outcome: the recycling of nucleotides and the removal of potentially toxic ribosomal components.

Why rRNA Degradation Matters

The importance of rRNA degradation extends far beyond simple waste disposal. First, rRNA degradation is a major component of ribosome turnover, allowing cells to replace old or damaged ribosomes with newly synthesized ones. This is particularly critical in neurons and other long-lived cells that must maintain protein synthesis capacity for decades. Second, rRNA degradation serves as a quality control mechanism: ribosomes that fail to assemble correctly, contain damaged rRNA, or stall during translation must be eliminated to prevent the production of aberrant proteins. Third, rRNA degradation provides a rapid source of nucleotides during nutrient deprivation, allowing cells to recycle the substantial phosphate and nitrogen resources invested in ribosomes. Finally, dysregulation of rRNA degradation has been implicated in cancer, neurodegeneration, and aging, making it a topic of considerable biomedical interest.

The Major Pathways of rRNA Degradation

Two principal pathways mediate rRNA degradation in eukaryotic cells: the exosome-mediated RNA decay pathway and the autophagy-lysosomal pathway (ribophagy). These pathways differ in their substrates, mechanisms, and regulatory inputs, and they are deployed under different physiological conditions.

Exosome-Mediated rRNA Decay

The RNA exosome is a conserved multi-subunit complex that possesses 3′→5′ exoribonuclease activity. In the nucleus, the exosome participates in the processing of precursor rRNA (pre-rRNA) during ribosome biogenesis, trimming the external and internal transcribed spacers that flank the mature rRNA sequences. In the cytoplasm, the exosome degrades mRNA and, under certain conditions, rRNA.

Cytoplasmic exosome-mediated rRNA degradation typically requires the prior endonucleolytic cleavage of rRNA within the ribosome. This cleavage generates entry sites for the exosome, which then processively degrades the RNA from the 3′ end. The exosome itself is a barrel-shaped complex: nine subunits form a ring structure (the EXO-9 core), with three of these subunits (Rrp41, Rrp42, and Rrp43 in yeast) possessing RNase PH-like domains. The catalytic activity of the cytoplasmic exosome is provided by the associated protein Dis3/Rrp44, which has both 3′→5′ exoribonuclease and endoribonuclease activities, and Rrp6, a distributive 3′→5′ exonuclease.

For the exosome to access rRNA, the ribosome must first be destabilized. This can occur through the action of specific endonucleases that cleave rRNA at exposed loops or single-stranded regions, or through the removal of ribosomal proteins that normally protect the rRNA from nuclease attack. In yeast, the endonuclease Rny1 (a member of the RNase T2 family) has been shown to cleave rRNA in response to oxidative stress, generating fragments that are subsequently degraded by the exosome. In mammalian cells, the endoribonuclease ZC3H12A (also known as Regnase-1) can target rRNA under inflammatory conditions.

Ribophagy: Selective Autophagy of Ribosomes

Ribophagy is a selective form of autophagy in which ribosomes are specifically targeted for degradation in lysosomes (in mammals) or vacuoles (in yeast). This process is distinct from non-selective autophagy, which engulfs cytoplasmic contents randomly. Ribophagy requires the recognition of ribosomes by autophagy receptors, which link the ribosome to the autophagosomal membrane.

In yeast, ribophagy is regulated by the ubiquitin protease Ubp3 and its cofactor Bre5, which deubiquitinate ribosomal proteins to mark ribosomes for autophagic degradation. The ribosome itself is recognized by the autophagy receptor Cue5, which binds to ubiquitinated ribosomal proteins and to Atg8, a protein that decorates the autophagosomal membrane. In mammals, the situation is more complex, with multiple receptors potentially involved, including NUFIP1 (nuclear FMR1-interacting protein 1), which translocates from the nucleus to the cytoplasm under nutrient deprivation and delivers ribosomes to autophagosomes.

Ribophagy is particularly prominent during nutrient starvation. When amino acids are scarce, cells degrade ribosomes to release nucleotides and amino acids that can be used for essential metabolic processes. This is an energetically favorable strategy because ribosomes are among the most abundant protein-RNA complexes in the cell, and their degradation provides a substantial pool of recyclable building blocks.

Molecular Mechanisms of rRNA Decay

The enzymatic degradation of rRNA proceeds through two general phases: an initial endonucleolytic cleavage that generates RNA fragments with accessible ends, followed by exonucleolytic digestion that completely degrades these fragments to nucleotides. The specific enzymes involved depend on the cellular compartment and the physiological context.

Endonucleases in rRNA Degradation

Endonucleases cleave rRNA internally, generating fragments that are then substrates for exonucleases. Several endonucleases have been implicated in rRNA degradation across different organisms.

In bacteria, the endonuclease RNase E plays a central role in rRNA degradation. RNase E is a large, multi-domain enzyme that recognizes single-stranded AU-rich regions and cleaves RNA internally. During starvation or stress, RNase E initiates the degradation of rRNA by cleaving within the mature rRNA sequences, generating fragments that are subsequently degraded by exonucleases such as RNase II, RNase R, and PNPase. In Escherichia coli, RNase E is part of the degradosome, a multi-enzyme complex that also contains the helicase RhlB and the exonucleases PNPase and RNase PH.

In eukaryotes, the endonuclease Rny1 (in yeast) and its mammalian homologs, the RNase T2 family members, are secreted or vacuolar enzymes that can be released into the cytoplasm under stress conditions. Rny1 cleaves rRNA at specific sites, particularly within the 25S rRNA in yeast, generating characteristic fragmentation patterns. The release of Rny1 from the vacuole into the cytoplasm is an early event in stress-induced rRNA degradation and can occur before the onset of apoptosis.

Another important endonuclease is IRE1 (inositol-requiring enzyme 1), which is best known for its role in the unfolded protein response (UPR). Under endoplasmic reticulum (ER) stress, IRE1 cleaves specific mRNAs, but it has also been shown to cleave rRNA at the 28S rRNA in mammalian cells, contributing to the global translation inhibition observed during ER stress.

Exonucleases and the Exosome Complex

Following endonucleolytic cleavage, exonucleases complete the degradation of rRNA fragments. The major 3′→5′ exonuclease in eukaryotic cells is the RNA exosome, which, as described above, is a multi-subunit complex with processive exoribonuclease activity. The exosome requires RNA substrates with accessible 3′ ends, which are provided by endonucleolytic cleavage or by the removal of protective proteins.

In addition to the exosome, several other exonucleases contribute to rRNA degradation. The cytoplasmic 5′→3′ exonuclease Xrn1 degrades RNA from the 5′ end and can act on rRNA fragments that have been cleaved endonucleolytically. Xrn1 is a processive enzyme that requires a 5′ monophosphate for activity, which is generated by endonucleolytic cleavage or by the removal of the 5′ cap (in the case of mRNA). For rRNA, which lacks a cap, the 5′ end is typically phosphorylated, making it a substrate for Xrn1 after endonucleolytic cleavage.

In bacteria, the exonucleases RNase II, RNase R, and PNPase degrade RNA processively from the 3′ end. RNase R is particularly notable because it can degrade RNA with extensive secondary structure, making it well-suited for the degradation of rRNA fragments that retain significant structure. PNPase is a phosphorolytic enzyme that degrades RNA using inorganic phosphate, generating nucleoside diphosphates as products.

The table below summarizes the key enzymes involved in rRNA degradation across different organisms:

Regulation of rRNA Degradation

rRNA degradation is not a constitutive process; it is tightly regulated by nutrient availability, stress signals, and growth conditions. The key regulators are the TOR (target of rapamycin) signaling pathway, which coordinates cell growth with nutrient availability, and various stress-responsive kinases.

Nutrient Sensing and TOR Signaling

The TOR signaling pathway is the central regulator of ribosome homeostasis. Under nutrient-rich conditions, TOR complex 1 (TORC1) is active and promotes ribosome biogenesis while suppressing ribosome degradation. TORC1 achieves this through multiple mechanisms: it activates RNA polymerase I transcription of rRNA genes, promotes the translation of ribosomal protein mRNAs, and inhibits autophagy, including ribophagy.

When nutrients are limiting, TORC1 is inactivated, leading to a coordinated shutdown of ribosome biogenesis and activation of ribosome degradation. The inactivation of TORC1 leads to the dephosphorylation and activation of the transcription factors Gcn4 (in yeast) and TFEB (in mammals), which upregulate the expression of autophagy-related genes, including those required for ribophagy. In yeast, TORC1 inactivation also leads to the dephosphorylation of Atg13, which is required for autophagosome formation.

The connection between TORC1 and rRNA degradation is particularly evident during nitrogen starvation. When yeast cells are deprived of nitrogen, TORC1 is rapidly inactivated, and within hours, a significant fraction of ribosomes are degraded via ribophagy. This degradation is selective: ribosomes are degraded while other cytoplasmic components are largely spared. The selectivity is achieved through the ubiquitination of ribosomal proteins, which marks ribosomes for recognition by the autophagy receptor Cue5.

Stress-Induced rRNA Degradation

Various stress conditions trigger rRNA degradation through pathways that are independent of TORC1. Oxidative stress, for example, activates the endonuclease Rny1 in yeast, which is released from the vacuole into the cytoplasm and cleaves rRNA. This cleavage is an early event in the cellular response to oxidative stress and contributes to the global inhibition of translation that occurs under these conditions.

In mammalian cells, ER stress activates IRE1, which cleaves 28S rRNA as part of the integrated stress response. This cleavage is thought to contribute to the reduction in protein synthesis that accompanies ER stress, allowing cells to cope with the accumulation of misfolded proteins. The cleavage of rRNA by IRE1 is regulated by the binding of the co-chaperone BiP, which dissociates from IRE1 upon ER stress, allowing IRE1 to dimerize and become active.

DNA damage also induces rRNA degradation. The tumor suppressor p53, which is activated by DNA damage, represses RNA polymerase I transcription and promotes the degradation of rRNA through the activation of ribophagy. This is part of the cellular response to genotoxic stress, which aims to halt cell growth and division until the DNA damage is repaired.

Physiological Roles of rRNA Degradation

rRNA degradation serves several critical physiological functions, including ribosome quality control, adaptation to nutrient deprivation, and the regulation of cellular aging.

Ribosome Quality Control

Ribosome biogenesis is a complex process that involves the coordinated assembly of rRNA and ribosomal proteins. Errors in this process can generate defective ribosomes that are unable to translate mRNA accurately or efficiently. rRNA degradation is a key component of ribosome quality control, eliminating defective ribosomes before they can participate in translation.

In the nucleus, the exosome degrades pre-rRNA molecules that fail to assemble correctly. This is particularly important for the removal of aberrant processing intermediates that could otherwise accumulate and interfere with ribosome biogenesis. The exosome is recruited to defective pre-rRNA through the TRAMP complex, which adds a short poly(A) tail to the RNA and stimulates exosome activity.

In the cytoplasm, defective ribosomes that stall during translation are recognized by the ribosome quality control (RQC) pathway. This pathway involves the splitting of stalled ribosomes into subunits, the ubiquitination of ribosomal proteins, and the degradation of the associated mRNA and nascent polypeptide. The rRNA from stalled ribosomes is subsequently degraded, either by the exosome or through ribophagy. The ubiquitination of ribosomal proteins by the E3 ligase Listerin (in mammals) or Ltn1 (in yeast) marks the ribosome for degradation and prevents the accumulation of potentially toxic ribosomal subunits.

Response to Nutrient Deprivation

During nutrient deprivation, cells must reallocate resources from growth-related processes to survival-related processes. Ribosomes are among the most abundant protein-RNA complexes in the cell, and their degradation provides a substantial pool of nucleotides and amino acids that can be used for essential metabolic processes.

The degradation of ribosomes during starvation is primarily mediated by ribophagy. In yeast, nitrogen starvation induces the degradation of approximately 30–40% of cellular ribosomes within 24 hours. This degradation is selective and requires the activity of the ubiquitin protease Ubp3, which deubiquitinates ribosomal proteins to mark ribosomes for autophagic degradation. The released nucleotides are then used for the synthesis of essential metabolites, including amino acids and nucleotides required for survival.

In mammalian cells, ribophagy is induced by amino acid starvation and is regulated by the mTORC1 pathway. When mTORC1 is inhibited, the transcription factor TFEB translocates to the nucleus and upregulates the expression of autophagy-related genes, including those required for ribophagy. The degradation of ribosomes under these conditions provides amino acids that can be used for the synthesis of proteins required for the stress response.

Methods to Study rRNA Degradation

Studying rRNA degradation requires methods that can distinguish between the degradation of rRNA and other RNA species, and that can quantify the rate and extent of degradation under different conditions.

RNA Sequencing and Degradome Analysis

RNA sequencing (RNA-seq) can be used to study rRNA degradation by analyzing the abundance of rRNA fragments. In a typical RNA-seq experiment, rRNA is removed from the sample using hybridization-based methods (e.g., RiboZero or RiboMinus) to enrich for mRNA. However, if rRNA is not removed, the sequencing data will contain a large number of rRNA reads, which can be analyzed to identify degradation patterns.

Degradome analysis is a specialized form of RNA-seq that captures the 5′ ends of RNA fragments generated by endonucleolytic cleavage. This method involves ligating an adapter to the 5′ end of RNA fragments that have a 5′ monophosphate, which is characteristic of endonucleolytic cleavage products. The resulting libraries are sequenced and mapped to the rRNA sequence to identify cleavage sites. This approach has been used to identify specific rRNA cleavage sites in yeast and mammalian cells under various stress conditions.

A more quantitative approach involves the use of spike-in controls. Known amounts of exogenous RNA are added to the sample before RNA extraction, and the ratio of rRNA to spike-in RNA is used to calculate the absolute amount of rRNA in the sample. This allows the measurement of rRNA degradation rates over time.

Metabolic Labeling with Nucleotide Analogs

Metabolic labeling is a classic method for studying RNA turnover. Cells are incubated with a labeled nucleotide analog, such as ⁴-thiouridine (4sU) or 5-ethynyl uridine (EU), which is incorporated into newly synthesized RNA. After a labeling period, the cells are washed and incubated in medium without the label, and the decay of labeled RNA is monitored over time.

For rRNA degradation studies, cells are labeled with 4sU for a short period (typically 1–2 hours), which is sufficient to label newly synthesized rRNA. The cells are then chased in medium without 4sU, and samples are collected at various time points. RNA is extracted, and the 4sU-labeled RNA is biotinylated and captured on streptavidin beads. The amount of labeled rRNA in each sample is quantified by quantitative PCR (qPCR) or RNA-seq, allowing the calculation of the rRNA degradation rate.

A more recent approach uses click chemistry with EU. Cells are labeled with EU, which contains an alkyne group that can react with an azide-containing fluorophore or biotin. This allows the visualization of newly synthesized RNA by fluorescence microscopy and the purification of labeled RNA for downstream analysis. The combination of EU labeling with pulse-chase analysis provides a powerful approach for studying rRNA degradation in specific cell types or under specific conditions.

rRNA Degradation in Disease

Dysregulation of rRNA degradation has been implicated in several human diseases, including cancer, neurodegeneration, and autoimmune disorders.

rRNA Degradation and Cancer

Cancer cells have an elevated demand for protein synthesis to support rapid proliferation, and they typically have increased ribosome biogenesis. However, rRNA degradation also plays a role in cancer biology. The tumor suppressor p53, which is mutated in approximately 50% of human cancers, regulates rRNA degradation in response to stress. In cells with wild-type p53, DNA damage induces the degradation of rRNA through the activation of ribophagy, contributing to the growth arrest that follows DNA damage. In cancer cells with mutant p53, this response is lost, and rRNA degradation is impaired.

The dysregulation of rRNA degradation in cancer is also linked to the mTORC1 pathway. Many cancers have activating mutations in the PI3K-AKT-mTORC1 pathway, leading to constitutive mTORC1 activity. This promotes ribosome biogenesis and suppresses ribophagy, allowing cancer cells to maintain high levels of ribosomes and protein synthesis. Inhibitors of mTORC1, such as rapamycin and its analogs, are used in cancer therapy and have been shown to induce ribophagy in cancer cells, contributing to their anti-proliferative effects.

Implications in Neurodegenerative Diseases

Neurons are long-lived cells that must maintain protein synthesis capacity for decades. The accumulation of damaged ribosomes and the dysregulation of rRNA degradation have been implicated in several neurodegenerative diseases, including Alzheimer's disease, Parkinson's disease, and amyotrophic lateral sclerosis (ALS).

In Alzheimer's disease, the aggregation of amyloid-beta and tau proteins is associated with impaired ribosome function and increased rRNA degradation. Studies have shown that rRNA levels are reduced in the brains of Alzheimer's disease patients, and that this reduction correlates with the severity of cognitive impairment. The mechanism may involve the activation of stress pathways that induce rRNA degradation, including the integrated stress response and the unfolded protein response.

In ALS, mutations in genes involved in RNA metabolism, such as TDP-43 and FUS, are associated with altered rRNA degradation. TDP-43 is an RNA-binding protein that is involved in the regulation of RNA stability, and its mislocalization in ALS is associated with changes in rRNA levels. The dysregulation of rRNA degradation in ALS may contribute to the motor neuron degeneration that characterizes the disease.

Common Misconceptions and Pitfalls

Students often encounter several misconceptions when learning about rRNA degradation. Understanding these pitfalls is essential for a correct grasp of the topic.

rRNA Degradation vs. mRNA Decay

A common error is to assume that rRNA degradation and mRNA decay are the same process. While both involve the enzymatic breakdown of RNA, they differ fundamentally in their substrates, mechanisms, and regulation. mRNA decay is a highly regulated process that controls gene expression by determining the half-life of individual mRNAs. It typically involves the removal of the 5′ cap (decapping), deadenylation of the 3′ poly(A) tail, and degradation by the exosome or Xrn1. mRNA decay is rapid, with most mRNAs having half-lives of minutes to hours, and it is a major point of regulation for gene expression.

rRNA degradation, in contrast, is a slower process that is primarily involved in ribosome turnover and quality control. rRNA is highly stable under normal conditions, and its degradation is typically triggered by stress or damage. The enzymes involved in rRNA degradation overlap with those involved in mRNA decay (e.g., the exosome and Xrn1), but the substrates and regulatory inputs are different. Confusing these two processes can lead to incorrect predictions about the behavior of rRNA under conditions that affect mRNA stability.

Is rRNA Degradation Always Bad?

Another misconception is that rRNA degradation is always detrimental to the cell. While excessive rRNA degradation can lead to a loss of protein synthesis capacity and cell death, regulated rRNA degradation is essential for cellular homeostasis. The removal of damaged or defective ribosomes is a protective mechanism that prevents the production of aberrant proteins. The degradation of ribosomes during starvation provides essential nutrients for survival. And the degradation of rRNA during development and differentiation contributes to the remodeling of the ribosome pool to match the changing needs of the cell.

The context-dependent nature of rRNA degradation is important to understand. In some cases, rRNA degradation is a sign of pathology, such as in neurodegenerative diseases. In other cases, it is a normal physiological process that contributes to cellular adaptation. The key is to understand the triggers, the pathways involved, and the consequences of rRNA degradation in each specific context.

Summary and Key Takeaways

rRNA degradation is a fundamental process in RNA biology that involves the enzymatic breakdown of ribosomal RNA. It occurs through two major pathways: exosome-mediated rRNA decay and ribophagy, the selective autophagic degradation of ribosomes. These pathways are regulated by nutrient availability, stress signals, and growth conditions, with the TOR signaling pathway playing a central role. rRNA degradation serves critical functions in ribosome quality control, adaptation to nutrient deprivation, and cellular aging. Dysregulation of rRNA degradation is implicated in cancer, neurodegeneration, and other diseases. Understanding rRNA degradation is essential for a complete picture of RNA metabolism and cellular homeostasis.

Frequently Asked Questions

What is the term for rRNA degradation?

The term for rRNA degradation is rRNA decay or rRNA degradation. A specialized form of rRNA degradation that involves the selective autophagic destruction of entire ribosomes is called ribophagy. These terms are used interchangeably in the literature, though "ribophagy" specifically refers to the autophagy-mediated pathway.

How is rRNA degraded in cells?

rRNA is degraded through two main pathways. The first involves the general RNA decay machinery, including endonucleases that cleave rRNA internally and exonucleases such as the RNA exosome and Xrn1 that digest the resulting fragments. The second pathway is ribophagy, where entire ribosomes are engulfed by autophagosomes and delivered to lysosomes or vacuoles for degradation.

Why is rRNA degradation important?

rRNA degradation is important for several reasons: it eliminates damaged or defective ribosomes (quality control), provides nucleotides and amino acids during nutrient deprivation, regulates ribosome numbers to match cellular needs, and contributes to the cellular response to stress. Dysregulation of rRNA degradation is associated with various diseases.

What triggers rRNA degradation?

rRNA degradation is triggered by nutrient deprivation (particularly nitrogen or amino acid starvation), oxidative stress, ER stress, DNA damage, and other stress conditions. These triggers activate specific signaling pathways, including the TOR pathway and stress-responsive kinases, which in turn activate the rRNA degradation machinery.

Is rRNA degradation the same as mRNA degradation?

No, rRNA degradation and mRNA degradation are distinct processes. mRNA degradation is a rapid, highly regulated process that controls gene expression by determining mRNA half-lives. rRNA degradation is a slower process primarily involved in ribosome turnover and quality control. While they share some enzymes (e.g., the exosome), the substrates, regulation, and physiological roles are different.

Can rRNA degradation be measured?

Yes, rRNA degradation can be measured using several methods, including RNA sequencing and degradome analysis, metabolic labeling with nucleotide analogs such as 4-thiouridine or 5-ethynyl uridine, and quantitative PCR. These methods allow the measurement of rRNA levels, the identification of cleavage sites, and the calculation of degradation rates.

What happens if rRNA degradation is defective?

Defective rRNA degradation leads to the accumulation of damaged or defective ribosomes, which can impair protein synthesis and lead to the production of aberrant proteins. This is associated with neurodegenerative diseases, cancer, and aging. In contrast, excessive rRNA degradation can deplete the ribosome pool and lead to cell death.

Key Takeaways

• rRNA degradation is the enzymatic breakdown of ribosomal RNA, occurring through exosome-mediated decay and ribophagy.
• The RNA exosome and Xrn1 are key exonucleases, while Rny1, IRE1, and RNase E are important endonucleases in rRNA degradation.
• rRNA degradation is regulated by the TOR signaling pathway, stress-responsive kinases, and nutrient availability.
• rRNA degradation serves critical functions in ribosome quality control, nutrient recycling during starvation, and cellular stress responses.
• Dysregulation of rRNA degradation is implicated in cancer, neurodegeneration, and aging.
• rRNA degradation is distinct from mRNA degradation in terms of substrates, mechanisms, and physiological roles.
• Methods to study rRNA degradation include RNA-seq, degradome analysis, and metabolic labeling with nucleotide analogs.

Related Topics

• RNA Degradation
• mRNA Degradation
• RNA Binding Protein
• Antisense Oligonucleotide
• Non Coding RNA

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