O-glycosyl-L-threonine hexosaminylated residue O-hexosaminylated threonine 161.0688018798828125 161.160003662109375 262.116485595703125 262.260009765625 A protein modification that effectively converts an L-threonine residue to O-hexosaminyl-L-threonine. C 10 H 18 N 2 O 6 C 6 H 11 N 1 O 4 HexN Hexosamine MOD:01306 PSI-MOD T The natural modifications are O-(N-acetylaminogalactosyl)-L-threonine (MOD:00164) or O-(N-acetylaminoglucosyl)-L-threonine (MOD:00806) [JSG]. Unimod:454 natural