2.7.1.157 F444A mutation in residue equivalent to residue Tyr379 of galactokinase, whose alteration dramatically enhances the substrate range of this enzyme. Mutation does not result in large changes to the specificity of the enzyme 721309 2.7.1.157 F444C mutation in residue equivalent to residue Tyr379 of galactokinase, whose alteration dramatically enhances the substrate range of this enzyme. Mutation does not result in large changes to the specificity of the enzyme but increases turnover rate with N-acetylgalactosamine 721309 2.7.1.157 F444H mutation in residue equivalent to residue Tyr379 of galactokinase, whose alteration dramatically enhances the substrate range of this enzyme. Mutation does not result in large changes to the specificity of the enzyme 721309 2.7.1.157 F444K mutation in residue equivalent to residue Tyr379 of galactokinase, whose alteration dramatically enhances the substrate range of this enzyme. Mutation does not result in large changes to the specificity of the enzyme 721309 2.7.1.157 F444R mutation in residue equivalent to residue Tyr379 of galactokinase, whose alteration dramatically enhances the substrate range of this enzyme. Mutation does not result in large changes to the specificity of the enzyme 721309 2.7.1.157 F444S mutation in residue equivalent to residue Tyr379 of galactokinase, whose alteration dramatically enhances the substrate range of this enzyme. Mutation does not result in large changes to the specificity of the enzyme but increases turnover rate with N-acetylgalactosamine 721309 2.7.1.157 F444W mutation in residue equivalent to residue Tyr379 of galactokinase, whose alteration dramatically enhances the substrate range of this enzyme. Mutation does not result in large changes to the specificity of the enzyme 721309