Transfer inhibition of RP4 by F factor.
When RP4 and F factors were brought together into one E. coli cell, the F factor reduced 500-1000-fold the frequency of transfer of RP4. However, F had almost no effect on the surface exclusion and pilus formation by RP4. In contrast, RP4 did not affect the transfer of F. Using in vitro recombinant DNA techniques, a gene of F responsible for the above-mentioned transfer inhibition of RP4 was located within the BamHI fragment (40.4-42.8 kb) of the mini-F sequence on F. From the result of product analysis using minicells, the responsible gene in the BamHI fragment was inferred to encode the 33 K protein.
22 references, click to expand
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