Source:http://linkedlifedata.com/resource/umls/id/C0014241
MSH: A family of enzymes that catalyze the endonucleolytic cleavage of RNA. It includes EC 3.1.26.-, EC 3.1.27.-, EC 3.1.30.-, and EC 3.1.31.-.,NCI: A hydrolase enzyme which makes oligonucleotides and polynucleotides by hydrolysing the interior bonds of ribonucleotides. (On-line Medical Dictionary)