Several investigators have reported that the activation of amino acids for protein synthesis, i.e. the incorporation of amino acids into soluble ribonucleic acids, is dependent upon the source of both the aminoacyl S-RNA’ synthetases and the S-RNA itself. For example, Rendi and Ochoa (1) reported that aminoacyl S-RNA synthetases from Escherichia coli could not incorporate leucine into yeast or ...
