mono-N-acetylaminogalactosylated residue O4'-(N-acetylamino)galactosyl-L-tyrosine (2S)-2-amino-3-(D-2-acetamido-2-deoxygalactopyranosyloxy)phenylpropanoic acid 203.079376220703125 203.19000244140625 366.1427001953125 366.3699951171875 A protein modification that effectively converts an L-tyrosine residue to O4'-(N-acetylamino)galactosyl-L-tyrosine. C 17 H 22 N 2 O 7 C 8 H 13 N 1 O 5 CARBOHYD O-linked (GalNAc) tyrosine MOD:01916 O4'-(N-acetylamino)galactosyl-L-tyrosine O4'-(N-acetylgalactosaminyl)tyrosine O4'-glycosyl-L-tyrosine PSI-MOD Y mucin type O-glycosyltyrosine natural uniprot.ptm:PTM-0570 O-glycosyl-L-tyrosine