REC-MEDIATED RECOMBINATIONAL HOT SPOT ACTIVITY IN BACTERIOPHAGE LAMBDA II. A MUTATION WHICH CAUSES HOT SPOT ACTIVITY
Author(s) -
Stephen T.S. Lam,
Mary M. Stahl,
Kenneth D. McMilin,
Franklin W. Stahl
Publication year - 1974
Publication title -
genetics
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 2.792
H-Index - 246
eISSN - 1943-2631
pISSN - 0016-6731
DOI - 10.1093/genetics/77.3.425
Subject(s) - hot spot (computer programming) , biology , genetics , recbcd , mutation , bacteriophage , chromosome , mutant , gene , microbiology and biotechnology , escherichia coli , computer science , operating system
Crosses have been performed which identify phage mutants (chi) which cause recombinational hot spot activity in λ. The hot spot activity is found in crosses of red- gam- chi- strains in rec+ hosts; in the crosses reported here, both the chi- mutations and the hot spot are located near the right end of the chromosome. The hot spot occurs in standard crosses as well as under conditions which block DNA synthesis, and is dependent on a functional host recB gene.—The chi mutation is shown to be dominant, but the tests do not show whether chi is a gene or a site.
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