3.5.1.54 allophanate + H2O 2nd step in the degradation of urea 3.5.1.54 allophanate + H2O - 3.5.1.54 allophanate + H2O the enzyme forms an alternative urea degradation pathway with the urea carboxylase, EC 6.3.4.6 3.5.1.54 allophanate + H2O the enzyme is involved in bacterial cyanuric acid metabolism 3.5.1.54 allophanate + H2O the reverse reaction is catalyzed by urea carboxylase 3.5.1.54 urea-1-carboxylate + H2O -