mutase from one mut ( - ) mutant turns over at a rate three to four times that of control enzyme when cells are grown in hydroxocobalamin-supplemented medium.to detect heterozygous carriers of mutant mut alleles , we compared mutase activity in fibroblast extracts from four controls with that from eight parents of either mut degrees or mut ( - ) mutants .
C0007634
cells
C0016030
fibroblast