histidine ammonia-lyase(redirected from histidinase)
an enzyme catalyzing deamination of l-histidine to urocanate and ammonia; this enzyme is absent or deficient in people with histidinemia.
his·ti·dine am·mo·ni·a-ly·ase(his'ti-dēn ă-mō'nē-ă-lī'ās)
An enzyme catalyzing deamination of l-histidine; this enzyme is absent or deficient in people with histidinemia.
A liver enzyme that catalyzes l-histidine with the resultant formation of urocanic acid and ammonia. Deficiency of this enzyme causes histidinemia.
See also: histidine