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J Bacteriol. 1973 April; 114(1): 144-151
Copyright © 1973 American Society for Microbiology. All Rights Reserved.

Physical Assay of Competence for Specific Mating-Pair Formation in Escherichia coli

Roger H. Walmsley

1 Department of Physics, University of Pennsylvania, Philadelphia, Pennsylvania 19104

ABSTRACT

The fractions of Escherichia coli female and male bacteria that are competent to form specific mating pairs at any time during normal exponential growth have been measured by a physical assay. The competencies of a Hayes- and a Cavali-type donor were 35 and 50%, respectively, in agreement with piliation assays reported by others. The competencies of two recipient strains, PA309 and P678, were found to be 33 and 29%, respectively.

J Bacteriol. 1973 April; 114(1): 144-151
Copyright © 1973 American Society for Microbiology. All Rights Reserved.





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Copyright © 1973 by the American Society for Microbiology. All rights reserved.