trna phee , coli was labeled with the n-hydroxysuccinimide esters of 1-dimethylaminonaphthalene-5-sulfonyl glycine and n-methylanthranilic acid through reaction with the amino acid moiety of its x-base , whereby yields of 66 % and 24 % , respectively , were obtained .
C0017890
glycine
C0002520
amino acid