The primary structure of a non-initiating methionine-specific tRNA from brewer's yeast.

tRNA3Met, one of the non-initiating methionine-specific tRNAs in brewer's yeast was purified from bulk tRNA labelled with [32P]phosphate by two column chromatographic steps. The primary structure of this tRNA was determined by the usual fingerprinting technique. Analyses of the isolated nucleotides and oligonucleotides from digests with pancreatic and T1 ribonucleases were in good agreement and stated that tRNA3Met consists of 76 nucleotide residues including 13 minor nucleotides. Overlaps from which the complete sequence could be deduced were derived from the analyses of 15 fragments obtained by partial digestion with T1 ribonuclease.