Abstract
Transfer RNA isolated after phage induction from an Escherichia coli strain carrying a λ prophage inserted at the normal attachment locus shows a threefold increase in lysine acceptor activity. This lysyl-tRNA preparation hybridizes to E. coli DNA and not to λDNA. The absence of a novel lysyl-tRNA species resolved by reversed phase chromatography (RPC-5) suggests that the observed elevation derives from increased production of the major host lysine isoacceptors. Neither infection of the same E. coli strain with λ nor induction of a prophage integrated at a secondary site near his alters lysine tRNA levels. Our results suggest that the observed amplification of lysine tRNA may derive from escape synthesis in the region of the normal attachment locus activated by prophage induction.
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