O-glycosyl-L-serine N-acetylaminohexosylated residue O-(N-acetylamino)hexosyl-L-serine 203.079376220703125 203.19000244140625 290.11138916015625 290.269989013671875 N-Acetylhexosamine PSI-MOD A protein modification that effectively converts an L-serine residue to O3-(N-acetylaminohexosyl)-L-serine. C 8 H 13 N 1 O 5 MOD:01675 none O-seryl-beta-N-acetylhexosaminide (S)-2-amino-3-(2-acetamido-2-deoxy-beta-D-hexopyranosyloxy)propanoic acid C 11 H 18 N 2 O 7 HexNAc S OHexNAcSer O-glycosylserine O3-(2-acetamido-2-deoxy-beta-D-hexopyranosyl)-L-serine hexNAcS natural O-(2-acetylamino-2-deoxy-beta-D-hexopyranosyl)-L-serine O-(N-acetylhexosaminyl)serine