Bilin A colored bile pigment, such as urobilin, that is formed by the oxidation of a colorless bilinogen.
Bilinogen A precursor of bile pigment, e.g., urobilinogen that forms a colored bilin (urobilin) pigment upon oxidation.
Biliprotein A chromoprotein in which the prosthetic group is a covalently linked pigment.
Bilirubin (mol wt 585) A bile pigment in the bile formed from breakdown of heme.
CH2 C|H2 CH2
H CH3 CH2 Ch2 CH3
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