Purification of the alanine-, valine-, histidine-, and tyrosine-acceptor ribonucleic acids from yeast.

According to present understanding of the biosynthesis of proteins, the first steps involve activation of the ammo acids (Equation 1) followed by the transfer of the amino acids to specific amino acid-acceptor ribonucleic acids (RNA’s) (Equation 2) (for a recent review see (1)). It is believed that the amino acid-acceptor RNA’s subsequently take part, with the “template” RNA, in determining the sequence of amino acids in