The enzymatic defect in histidinemia.
D000581:Amidohydrolases / Q000172:deficiency*; D000592:Amino Acid Metabolism, Inborn Errors; D006639:Histidine / Q000097:blood*; D006638:Histidine Ammonia-Lyase / Q000172:deficiency; D006801:Humans; D008607:Intellectual Disability
D006639:Histidine; D000581:Amidohydrolases; D006638:Histidine Ammonia-Lyase
AMIDASES/deficiency; HISTIDINE/blood