Predicted to enable homogentisate 1,2-dioxygenase activity and identical protein binding activity. Predicted to be involved in L-phenylalanine catabolic process. Predicted to act upstream of or within cellular amino acid metabolic process. Human ortholog(s) of this gene implicated in alkaptonuria. Orthologous to human HGD (homogentisate 1,2-dioxygenase). [provided by Alliance of Genome Resources, Apr 2022]