polypeptide chains of 10 aminoacyl-transfer ribonucleic acid synthetases ( those for arginine , glutamine , glutamic acid , glycine , isoleucine , leucine , lysine , phenylalanine , threonine , and valine ) have been identified in lysates of escherichia coli resolved by the o'farrell two-dimensional gel system .
C0017797
glutamine
C0061472
glutamic acid