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hemoprotein
(redirected from Hemoproteins)

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hemoprotein /he·mo·pro·tein/ (-pro´tēn) a conjugated protein containing heme as the prosthetic group, such as catalase, cytochrome, hemoglobin, or myoglobin.
he·mo·pro·tein (hm-prtn)
n.
A conjugated protein containing a metal-porphyrin compound as the prosthetic group.
hemoprotein [he″mo-pro´tēn]
a conjugated protein whose nonprotein portion is heme; examples include catalase, cytochrome, hemoglobin, and myoglobin.
hemoprotein
a conjugated protein whose nonprotein portion is heme.
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Preferred biocatalysts include hemoproteins such as chloroperoxidase from Caldariomyces fumago, and peroxidases and cytochromes from animal, plant or microbial cells.
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The antioxidant properties of ergothioneine appear to be related to at least four molecular activities: the ability to scavenge directly reactive oxygen species; to chelate various divalent metallic cations (positively charged ions); to activate antioxidant enzymes such as glutathione peroxidase (Se-GPx) and MnSOD and to inhibit superoxide-generating enzymes such as NADPH-Cytochrome c reductase; and to affect the oxidation of various hemoproteins such as hemoglobin and myoglobin.
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