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The effect of a yjjG mutation on the utilization of thymine and thymidine by a thyA mutant. Cultures of BW1614 (thyA mutant) and BW1835 (thyA yjjG mutant) were plated on glucose minimal medium supplemented with various concentrations of (A) thymine or (B) thymidine and incubated for 24 h at 37°C. Each datum point represents the mean ± standard error of the mean for 25 to 50 uncrowded colonies.
