Nucleic Acids Research, 1981, Vol. 9, No. 24 6975-6984
© 1981
MOLECULAR BIOLOGY |
Direction of bacteriophage
DNA replication in a thymine requiring Escherichia coli K-12 strain. Effect of thymidine concentration
Biophysics Laboratory and Department of Biochemistry, University of Wisconsin Madison, WI 53706, USA
Received October 12, 1981.
The direction of replication was established for the first round of bacteriophage
DNA replication in thymine requiring E. coli K-12 cells exposed to different concentrations of thymidine. It was found that a dramatic decrease in the proportion of bidirectionally replicating molecules followed a decrease in the concentration of thymidine. Moreover, the rightward mode of replication appears to be exclusively favored in unidirectionally replicating molecules found at low concentrations of thymidine.