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he·mo·pro·tein or chiefly Brit hae·mo·pro·tein -'prō-.tēn, -'prōt-ē-ən n a conjugated protein (as hemoglobin or cytochrome) whose prosthetic group is a porphyrin combined with iron
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he·mo·pro·tein (heґmo-pro″tēn) a conjugated protein containing heme as the prosthetic group; examples include catalase, cytochrome, hemoglobin, and myoglobin.Medical dictionary. 2011.