Answers are grounded in this paper and cite their sources.
A Chinese hamster ovary cell line, 2000A, in which threonyl-tRNA synthetase accounts for 1.5% of the total soluble protein, was used to demonstrate that this enzyme is a phosphoprotein. Threonyl-tRNA synthetase was isolated by immunoprecipitation from cells labeled with 32Pi for 18 h. Phosphoamino acid analysis of radiolabeled threonyl-tRNA synthetase showed that phosphorylation occurs on serine.
No takes yet. Share an insight, caveat, or question.
Gerken et al. (1984) studied this question.
Synapse has enriched 10 related papers. Consider them for comparative context: