. "Cytosolic dihydropyrimidinase tetramer catalyzes the reaction of 5,6-dihydrothymine and water to yield 3-ureidoisobutyrate (Hamajima et al. 1998)."^^ . . . . . . "5,6-dihydrothymine + H2O => beta-ureidoisobutyrate"^^ . "conversion of 5,6-Dihydrothymine to 3-Ureidoisobutyrate"^^ . "3.5.2.2"^^ . . . .