INABILITY OF THYMINE-DEPENDENT MUTANTS OF BACTERIOPHAGE T4 TO INDUCE THYMIDYLATE SYNTHETASE

Abstract
Infection of Escherichia coli by three thymine-requiring mutants of T4 phage induced little or no dTMP synthetase compared to the wild-type controls. A fourth mutant, td15, was clearly "leaky." At the same time a number of other phage-induced enzymes reached normal levels. These findings suggest that the mutations are related to thymidylate synthetase but do not indicate the nature of the mutations.