Source:http://linkedlifedata.com/resource/umls/id/C0031669
MSH: An enzyme found in the alpha-toxin of Clostridium welchii and other strains of clostridia and bacilli. It hydrolyzes glycerophosphatidates with the formation of 1,2-diacylglycerol and a phosphorylated nitrogenous base such as choline.