. . . . "4-imidazolone-5-propionate + oxygen + H2O + 2 H+ → 4-oxoglutaramate + ammonia + formate"^^ . "4-imidazolone-5-propionate + oxygen + H₂O + 2 H⁺ → 4-oxoglutaramate + ammonia + formate"^^ . . . . . . . . . . . . . . . "false"^^ . "4-imidazolone-5-propionate + oxygen + H2O + 2 H+ → 4-oxoglutaramate + ammonia + formate"^^ .