Hydrolases;
Acting on ester bonds;
Endoribonucleases producing 3'-phosphomonoesters
BRITE hierarchy

Transferred entry: pancreatic ribonuclease. Now EC 4.6.1.18, pancreatic ribonuclease. This reaction is now known to involve an internal-transfer (lyase) process to produce the cyclic derivative, followed by a reversal of that step with water in the "hydrolytic step"

EC 3.1.27.5 created 1972 as EC 3.1.4.22, transferred 1978 to EC 3.1.27.5, modified 1981, deleted 2018