O-phospho-L-threonine (2S,3R)-2-amino-3-(phosphonooxy)butanoic acid 181.014007568359375 181.0800018310546875 2-amino-3-hydroxybutanoic acid 3-phosphate 2-azanyl-3-(phosphonooxy)butanoic acid 79.96633148193359375 79.98000335693359375 A protein modification that effectively converts an L-threonine residue to O-phospho-L-threonine. C 0 H 1 N 0 O 3 P 1 C 4 H 8 N 1 O 5 P 1 MOD:00047 MOD_RES Phosphothreonine O-phospho-L-threonine O-phosphorylated L-threonine O3-phosphothreonine OPThr PSI-MOD Phospho Phospho Threonyl Phosphorylation T Unimod:21 natural phosphorylationt threonine phosphate ester uniprot.ptm:PTM-0254 residues isobaric at 181.00-181.02 Da modified L-threonine residue O-phosphorylated residue