3-keto-beta-D-galactose + beta-D-glucose => 3'-ketolactose + H2O
3-keto-beta-d-galactose + beta-d-glucose => 3'-ketolactose + h2o
3-keto-beta-D-galactose + beta-D-glucose => 3'-ketolactose + H2O
3-keto-beta-d-galactose + beta-d-glucose => 3'-ketolactose + h2o