N-(L-glutamyl)-L-tyrosine (S,S)-2-(2-aminopentanedio-1-yl)amino-3-(4-hydoxyphenyl)propanoic acid -17.002740859985351562 -17.010000228881835938 292.105926513671875 292.290008544921875 A protein modification that effectively forms a peptide bond between a C-terminal L-glutamic acid residue and a free L-tyrosine. C 0 H -1 N 0 O -1 C 14 H 16 N 2 O 5 C-term Cross-link 2. E, Y L-glutamyl L-tyrosine MOD:00262 N-(L-glutamyl)-L-tyrosine PSI-MOD SITE Involved in polymerization natural modified L-tyrosine residue crosslinked L-glutamic acid residue