Source:http://linkedlifedata.com/resource/umls/id/C0003589
MSH: The protein components of enzyme complexes (HOLOENZYMES). An apoenzyme is the holoenzyme minus any cofactors (ENZYME COFACTORS) or prosthetic groups required for the enzymatic function.,CSP: protein components of the enzyme minus any cofactors or prosthetic groups that might be required for the enzyme to be catalytically functional.