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pro·to·heme (pro″to-hēm) a heme in which the porphyrin is protoporphyrin; an example is protoheme IX, the heme found in hemoglobin.Medical dictionary. 2011.
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pro·to·heme (pro″to-hēm) a heme in which the porphyrin is protoporphyrin; an example is protoheme IX, the heme found in hemoglobin.Medical dictionary. 2011.