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Science 13 November 1992:
Vol. 258. no. 5085, pp. 1145 - 1148
DOI: 10.1126/science.1439823
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Articles

Science, Vol 258, Issue 5085, 1145-1148
Copyright © 1992 by American Association for the Advancement of Science

articles

Bacteriophage lambda PaPa: not the mother of all lambda phages

RW Hendrix and RL Duda

Department of Biological Sciences, University of Pittsburgh, PA 15260.

The common laboratory strain of bacteriophage lambda--lambda wild type or lambda PaPa--carries a frameshift mutation relative to Ur-lambda, the original isolate. The Ur-lambda virions have thin, jointed tail fibers that are absent from lambda wild type. Two novel proteins of Ur-lambda constitute the fibers: the product of stf, the gene that is disrupted in lambda wild type by the frameshift mutation, and the product of gene tfa, a protein that is implicated in facilitating tail fiber assembly. Relative to lambda wild type, Ur-lambda has expanded receptor specificity and adsorbs to Escherichia coli cells more rapidly.


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