chromoprotein
noun
chro·mo·pro·tein
ˌkrō-mə-ˈprō-ˌtēn
-ˈprō-tē-ən
: any of various proteins (such as hemoglobins, carotenoids, or flavoproteins) having a pigment as a prosthetic group
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Merriam-Webster unabridged
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