Source:http://linkedlifedata.com/resource/umls/id/C0018974
MSH: Proteins that contain an iron-porphyrin, or heme, prosthetic group resembling that of hemoglobin. (From Lehninger, Principles of Biochemistry, 1982, p480),CSP: conjugated protein containing heme as the prosthetic group.,NCI: Proteins that contain a metal-containing cofactor that consists of an iron atom contained in the center of a large heterocyclic organic ring called a porphyrin. One of the main functions of heme proteins is the retention of molecular oxygen to deliver it for enzymatic reactions. As a result, many heme-containing enzymes are located in the mitochondrion.