The enzymatic conversion of hemoglobin to bilirubin.
D000818:Animals; D001663:Bilirubin / Q000096:biosynthesis*; D006418:Heme; D006454:Hemoglobins / Q000378:metabolism*; D008099:Liver / Q000201:enzymology*; D008862:Microsomes, Liver / Q000201:enzymology; D010105:Oxygenases / Q000378:metabolism; D051381:Rats; D013154:Spleen / Q000378:metabolism
D006454:Hemoglobins; D006418:Heme; D010105:Oxygenases; D001663:Bilirubin