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The order of replication of chromosomal markers in Pseudomonas aeruginosa strain 1: I. Marker frequency analysis by transduction

Published online by Cambridge University Press:  14 April 2009

R. J. Booker
Affiliation:
Department of Microbiology, University of Otago, Dunedin, New Zealand
J. S. Loutit
Affiliation:
Department of Microbiology, University of Otago, Dunedin, New Zealand
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The generalized transducing phage F116 has been used to prepare lysates from fast- and slow-growing cultures of Pseudomonas aeruginosa strain 1. These lysates have been used to transduce a number of auxotrophic markers to prototrophy and the ratios of the numbers of transductants obtained with each lysate have been determined. Since the markers are those which have been mapped by conjugation in previous studies it has been possible to compare the ratios obtained for each marker with the relative position of the marker on the chromosome map. If the assumption is made that there is only one circular chromosome in P. aeruginosa strain 1 it is possible to suggest a way in which two apparently unlinked segments might be joined together. It is also possible to suggest that the chromosome replicates sequentially in two directions from a fixed origin.

Type
Research Article
Copyright
Copyright © Cambridge University Press 1974

References

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