Description

RiboBlock M RNase Inhibitor is a 50 kDa recombinant protein of murine origin produced in Escherichia coli. The inhibitor specifically inhibits RNases A, B and C. It inhibits RNases by binding noncovalently in a 1:1 ratio with high affinity. It is not effective against RNase 1, RNase T1, S1 Nuclease, RNase H or RNase from Aspergillus. In addition, no inhibition of polymerase activity is observed when RNase Inhibitor is used with Taq DNA Polymerase and Reverse transcriptase.
Since ribonucleases typically retain activity under denaturing conditions, care must be taken to avoid denaturing RNase Inhibitor molecules that have complexed with ribonuclease. To prevent, the release of active ribonuclease, temperatures greater than 50°C and high concentrations of denaturing agents should be avoided. Murine RNase inhibitor does not contain the pair of cysteines identified in the human version that is very sensitive to oxidation, which causes inactivation of the inhibitor. As a result, RiboBlock M RNase inhibitor has significantly improved resistance to oxidation compared to the human/porcine RNase inhibitors.
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