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J Virol. 1970 December; 6(6): 768-771
Copyright © 1970 American Society for Microbiology. All Rights Reserved.

Low-Frequency Rescue of a Genetic Marker in Deoxyribonucleic Acid from Bacillus Bacteriophage 105 by Superinfecting Bacteriophage ¹

Department of Bacteriology, Karolinska Institutet, S-104 01 Stockholm, Sweden

ABSTRACT

Markers in gene L, which maps at the right end of the vegetative and prophage maps, are rescued at a strongly reduced frequency from mature 105 deoxyribonucleic acid (DNA) by superinfecting phage but at high frequency from vegetative and prophage DNA. It is suggested that the ends of mature DNA are degraded when DNA is taken up by competent cells.

¹ Parts of this work were presented at the 10th International Congress for Microbiology, 9-15 August 1970, Mexico City.