. . . . "lactose + H2O = β-D-galactose + β-D-glucose"^^ . "lactose + H₂O = β-D-galactose + β-D-glucose"^^ . "3.2.1.108"^^ . . . . . . . . . "lactose + H2O = β-D-galactose + β-D-glucose"^^ .