Assertion: alkaptonuria | /r/HasProperty | 1,2 dioxygenase
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Source sentences:
text: Alkaptonuria, a rare autosomal recessive disorder caused by mutations in the HGD gene and deficiency of homogentisate 1,2 dioxygenase, is characterized by ochronosis, arthritis, and daily excretion of gram quantities of homogentisic acid (HGA).