198 Ribonuclease HII rnhB RNH2_YERPS MSETFIYPQANLIAGVDEVGRGPLVGAVVTAAVILDPNRPIVGLADSKKLSEKRRLSLYDEITEKALSWSLGRAEPEEIDQLNILHATMLAMQRAVSGLHIVPDYVLIDGNRCPKLQMPSLAVVKGDSRVAEISAASILAKVTRDREMTELDLLFPEYGFAQHKGYPTAFHLEKLAALGATVHHRRSFGPVKRVLGLV YPTB2989 Endonuclease that specifically degrades the RNA of RNA- DNA hybrids (By similarity).