Promega

RNasin Ribonuclease Inhibitor

Inhibits RNase A, B and C as well as human placental RNase. Does not inhibit other RNases and modifying enzymes like reverse transcriptases.

Native form from human placenta.
One unit is defined as the amount of RNasin® Ribonuclease Inhibitor required to inhibit the activity of 5ng of ribonuclease A by 50%. Activity is measured by the inhibition of hydrolysis of cytidine 2,3´-cyclic monophosphate by ribonuclease A