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J Virol. 1970 March; 5(3): 282-288
Copyright © 1970 American Society for Microbiology. All Rights Reserved.

Process of Infection with Bacteriophage X174

XXXIII. Templates for the Synthesis of Single-Stranded Deoxyribonucleic Acid

Division of Biology, California Institute of Technology, Pasadena, California 91109

ABSTRACT

The origin of the templates for the synthesis of X174 progeny single-stranded deoxyribonucleic acid was studied by means of the mutagenic activity associated with the decay of incorporated ³H-labeled 5-cytosine. The results indicate that the single-strand synthesis occurs in an asymmetric semiconservative manner using as template the complementary strands of the pool of replicative from molecules accumulated during the eclipse period. These complementary strands are repeatedly used as templates, and there is no detectable preferential use of complementary strand templates made early in the eclipse versus those made late.