Rna Extraction Purification
Rna Extraction Purification - Related Videos
11:09
Chromatin Isolation by RNA Purification (ChIRP)
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Cited by 380 •
2012
ChIRP is a novel and rapid technique to map genomic binding sites of long noncoding RNAs (lncRNAs). The method takes advantage of the specificity of anti-sense tiling oligonucleotides to allow the enumeration of lncRNA-bound genomic sites.
02:30
Isolation of Small Regulatory RNA–Bound Bacterial Target RNA Using Affinity Purification
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2025
Source: Mercier, N., et. al., MS2-Affinity Purification Coupled with RNA Sequencing in Gram-Positive Bacteria. J. Vis. Exp. (2021)This video demonstrates the isolation of MS2-tagged small regulatory RNA (sRNA) bound to its bacterial target RNA using affinity purification with a maltose-binding protein (MBP)–MS2 coat protein fusion immobilized on amylose resin.
05:38
RNA Extraction Assay: A Method to Extract RNA from miRNA Transfected Lung Cancer Cells
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2023
This video describes the RNA extraction protocol from miRNA transfected lung cancer cells. This approach can be used to identify a combinatorial miRNA treatment activity in halting the cell cycle and angiogenesis.
09:18
Purification of a Total Lipid Extract with Column Chromatography
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2023
Source: Laboratory of Jeff Salacup - University of Massachusetts Amherst The product of an organic solvent extraction, a total lipid extract (TLE), is often a complex mixture of hundreds, if not thousands, of different compounds. The researcher is often only interested in a handful of compounds. The compounds of interest may belong to one of several classes of compounds, such as alkanes, ketones, alcohols, or acids (Figure 1), and it may be useful to remove the compound classes to which it does...
17:25
RNA Extraction from Neuroprecursor Cells Using the Bio-Rad Total RNA Kit
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Cited by 1 •
2007
FAQs
Chaotropic buffers serve two purposes: they disrupt protein structure and inhibit RNases, enzymes that can degrade RNA. This early chemical protection helps preserve intact RNA during cell disruption. Because protein denaturation and RNase suppression occur together, the extract is better suited for later gene-expression measurements and sequencing workflows.
Phase separation and silica-membrane binding provide two supported routes for separating RNA from cellular debris. In phase separation, extraction chemistry partitions unwanted components into different phases. In the membrane approach, RNA binds to silica, contaminants are removed by washing, and the purified material is eluted. The choice changes the handling workflow while preserving the same purification goal.
RNase control is essential because these enzymes can break down RNA after cells are opened. Careful handling and low-temperature conditions reduce opportunities for degradation, helping maintain RNA integrity through purification. This matters biologically because damaged RNA can compromise samples intended for reverse transcription, RT-qPCR, transcriptomics, or RNA sequencing, limiting the reliability of downstream gene-expression analysis.
Residual proteins, DNA, lipids, or other contaminants can interfere with the intended use of an RNA preparation. Purification therefore is not judged only by how much material is recovered; it must also produce a sample clean enough for the selected assay. Effective removal supports dependable reverse transcription and gene-expression measurements, whereas contamination can reduce confidence in the resulting biological interpretation.
An RNA extraction workflow typically proceeds from cell disruption to chemical separation or membrane binding, followed by washing and elution. The sequence matters: disruption releases cellular contents, separation or binding isolates the RNA-containing fraction, and washing removes remaining unwanted material before recovery. Keeping these stages orderly helps generate a preparation appropriate for the planned downstream biological analysis.
Low-temperature handling and careful manipulation are practical safeguards throughout purification. They help limit RNA degradation while the sample moves through disruption, separation or membrane binding, washing, and elution. These conditions are especially relevant when the resulting preparation will support sensitive measurements of gene expression, because preserving RNA integrity increases the likelihood that the measured sample reflects the original biological material.
Biology researchers apply purified RNA to reverse transcription, RT-qPCR, transcriptomics, and RNA sequencing. These approaches can support gene-expression analysis, pathogen detection, developmental studies, and investigations of cellular responses. The purification step is therefore relevant across diverse biological questions, because its quality affects whether downstream measurements can be interpreted as meaningful molecular evidence.