Enzymatic formation of bilirubin.
D000818:Animals; D001663:Bilirubin / Q000096:biosynthesis*; D003580:Cytochromes / Q000378:metabolism; D006418:Heme / Q000378:metabolism*; D006801:Humans; D010105:Oxygenases / Q000378:metabolism*
D003580:Cytochromes; D006418:Heme; D010105:Oxygenases; D001663:Bilirubin