THE SPECIFIC INHIBITION OF THE ENZYMATIC AMINOACYLATION OF VALYL- AND TYROSYL-sRNA BY PERIODATE-OXIDIZED sRNA

Abstract
Degradation of sRNA by periodate oxidation or exonuclease digestion yielded products which competively inhibited the aminoacylation of native sRNA. The inhibition was specific for a given amino acid acceptor. Periodate oxidation of preparations enriched in tyrosyl-sRNA and poor in valyl-sRNA yielded an inhibitor effective in the tyrosine system and ineffective in the valine system. Similar specificity was observed with a periodate-treated fraction which had been enriched in valine acceptor activity.