ribonuclease

Reliable Assessment of Micronuclei for Genotoxicity Testing in Mice or Rats

...0 When fixed blood cells are treated with ribonuclease and antitransferrin receptor antibody (FITC-conjugate), and then stained with propidium iodide, normochromatic erythrocytes (NCEs) and RETswith and without MNare clearly resolved ( Figure 1 ). ...

RNase Protection Assay (RPA) Using DIG-Labeled RNA Probes

The ribonuclease protection assay (RPA) is a highly sensitiveand specific method for the detection and quantitationof mRNA species. The assay was made possibleby the discovery and characterization of bacteriophageencodedDNA-dependent RNA polymerases (SP6, T7,and T3)....

Improve RNA Isolation for Array Analysis and More

... yeast, bacteria), or samples that are high in ribonuclease or other contaminants (e.g. spleen, pancreas, plant and neural tissues). RiboPure is the method of choice for preparing RNA for use in microarray analysis or other procedures that ...

Detecting miRNA & siRNA

...d excess RNA probe were removed by a brief ribonuclease digestion. Protected target RNA fragments were rec...sing a reagent that simultaneously inactivates the ribonuclease and precipitates the nucleic acid. The protected RNA was then resuspended with gel l...

Detecting Attomole Amounts of Small RNA

...probe is then removed by a rapid ribonuclease digestion step. The hybridized, ...step technology for simultaneous ribonuclease inactivation and nucleic acid precipitation. RNA samples are then resuspended with...

Designing Controls for siRNA Experiments

... which activates the nonspecific ribonuclease RNase L. Another way is to monitor activation of the dsRNA-dependent protein kinase, PKR, which is involved in the type 1 interferon response. PKR phosphorylates the small subunit of the eukaryoti...

Combat RNase Contamination in the Lab

Trace amounts of ribonuclease (RNase) contamination can sabota...sed RNase inhibitor is placental ribonuclease inhibitor (RI), sold as Ribonuclease Inhibitor Protein. SUPERaseIn is distinct fro...

MicroRNA Profiling by Array Analysis Reveals Critical BioMarkers

...n RNAs of 70-100 nucleotides by the dsRNA-specific ribonuclease Drosha [8] (Figure 1). The hairpin RNAs are transported to the cytoplasm and digested by a second, double-strand specific ribonuclease, Dicer. The resulting 19-23mer miRNA is bound by a complex that is similar to or id...

Getting Started with MicroRNA Research

...al for digestion by a double-stranded (ds) ribonuclease (Drosha) to produce the precursor miRNA (Pre-miRNA). (3) Exportin-5 mediates nuclear export of pre-miRNAs. (4) A cytoplasmic dsRNA nuclease (Dicer) cleaves the pre-miRNA leaving 14 nt 3' overhangs. The single-stran...

Measuring RNase Activity A Real-time Kinetic Analysis

...minating RNA from DNA preparations and ribonuclease protection assays (RPA). Ambion sells ...otometric assay of bovine pancreatic ribonuclease by the use of cytidine 2',3'-phosphate. Biochem. J. 74 : 234. ...

Recombinant HIV Reverse Transcriptase

...n the presence of * 32 -P dUTP and 0.5 U/l ribonuclease inhibitor. The percentage cDNA conversion was determined by measuring the amount of cDNA made via scintillation counting. back to top...

Northern Analysis: The Basics

... disruption Inhibition of ribonuclease activity ...0">RNase Zap , a nontoxic ribonuclease decontamination solution for equipment and work surfaces for running formaldehyde...

Nuclease Protection Assays: The Basics

... Nuclease protection assays (NPAs), including both ribonuclease protection assays (RPAs) and S1 nuclease a... flexibility. The most common type of NPA, the ribonuclease protection assay, requires the use of RNA probes. Oligonucleotid...

RNA Interference and Gene Silencing: History and Overview

...and Hannon GJ. (2001) Role for a bidentate ribonuclease in the initiation step of RNA interference. Nature 409 :363-366. Nykanen A, Haley B, and Zamore PD. (2001) ATP requirements and small interfering RNA structure in the RNA interference pathway. Cell 107 :309-3...

Quintessence Biosciences advances cancer drug

...cology products advancing from the company's EVade ribonuclease development program. The AACR meeting provides Quintessence with an opportunity to report information on its emerging drug candidates, and perhaps establish collaborations with groups interested in developing cancer drugs....

Quintessence cancer treatment chosen for clinical studies

...company is developing new drugs based on its EVade ribonuclease technologies. In pre-clinical disease models, the QB139 compound demonstrated safe tumor-growth inhibition in vivo (inside the body) against human pancreatic, non-small cell lung, prostate, and ovarian tumors. Of the 30 EVade ribonucleases that...

Quintessence Biosciences forms cancer therapeutic advisory board

...ssence Biosciences, Inc. and inventor of the EVade ribonuclease technology Paul M. Sondel, M.D., Ph.D., professor in the departments of pediatrics, human oncology and genetics at the University of Wisconsin Comprehensive Cancer Center Founded in 2003, Quintessence Biosciences, Inc. is a company engaged in creat...

Americas Third Coast nurtures biotechnology

... cancer cells. However, cells also contain natural ribonuclease inhibitors (RI), which bind ribonucleases to prevent cell destruction. The Evade technology genetically modifies selected ribonucleases to prevent them from binding RI and losing potency inside targeted cancer cells. The selective toxicity of ribonu...