The Primary Structure of tRNAIIArg from Brewers' Yeast. 1. Complete Digestions with Pancreatic and T1 Ribonucleases

Abstract
TRNAIIArg purified from bulk brewers' yeast tRNA by countercurrent distribution followed by two column‐chromatographic steps was completely digested with pancreatic and T1 ribonucleases. Isolations of the products have been carried out either by column chromatography or by high‐voltage electrophoresis. Analyses of the isolated nucleotides and oligonucleotides were in good agreement and indicate that this tRNA is composed of 76 nucleotide residues including 13 minor nucleotides. Overlaps resulting from the end‐products of the two complementary digests led to a sequence of 25 residues. The primary structure of tRNAIIArg has been determined after partial digestion with T1 ribonuclease as described in the following paper.