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Mapping of two isoleucine tRNA isoacceptor genes in bacteriophage T5 DNA.

ABSTRACT

T5 bacteriophage codes for the synthesis of more than 14 different tRNA species, which map in four separate clusters in the C segment of the T5 chromosome. In this study, two tRNAile isoacceptor species have been identified by reverse-phase chromatography and shown to be transcribed from two different tRNA loci along the T5 chromosome. The map positions of the tRNA isoacceptors were aided by the use of several T5 deletion mutants in which the position and size of the deleted DNA segments had been previously determined by heteroduplex mapping. Hybridization analysis suggests the presence of some sequence homology between the two tRNAile species.