Alcaptonuria (Ochronosis).
D000474:Alkaptonuria / Q000175:diagnosis* / Q000201:enzymology; D006713:Homogentisic Acid; D006801:Humans; D007592:Joint Diseases / Q000175:diagnosis* / Q000201:enzymology; D010105:Oxygenases / Q000378:metabolism; D013122:Spinal Diseases / Q000175:diagnosis / Q000201:enzymology
D010105:Oxygenases; D006713:Homogentisic Acid