Methodology in Basic Genetics

By Walter J. Burdette | Go to book overview

Philip E. Hartman, Ph.D.


METHODOLOGY in TRANSDUCTION

Transduction will be used to mean the transfer of genetic material clearly of bacterial origin from one bacterium to another by means of bacteriophage particles. Phage-mediated will refer to carriage by mature extracellular particles with many of the physical and phenotypic attributes of their companion, normal, nontransducing particles. This approach is taken for expediency only and not in the belief that nature has so arranged genetic transfers by viruses into such clearcut categories.585, 591 For example, the ability of phages to affect various host properties through the process of conversion, will thus be neglected except to point out how such conversions generally may be differentiated from transductions and used in the genetic analysis of transducing episomes.

The first section of this report will deal with means which may be adopted in the search for a transducing system and in its characterization as transduction. Methods used in investigating the mechanism of transduction will be artificially separated, in the second section, from a discussion of the structure of the genomes contained in transducing particles in the third section. The final selection will describe some of the uses found for transduction in analyses of the bacterial genome.

No attempt will be made to describe in detail each method mentioned. Rather, each section will merely refer the reader to reliable sources in which the particular methodology is described in detail or in which it has been used to good advantage in critical experimentation.

____________________
The investigations of the author and his associates, summarized in this review, were supported by Research Grants E-1650 and E-3596 of the National Institute of Allergy and Infectious Diseases, U.S. Public Health Service.

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