thiophosphorylated residue 95.94348907470703125 96.04000091552734375 A protein modification that effectively replaces a hydrogen atom with a thiophosphono group (H2PO2S, 'thiophosphate'). H 1 O 2 P 1 S 1 MOD:00583 PSI-MOD Thiophospho Thiophosphorylation Unimod:260 X artifact sulfur containing modified residue phosphorus containing modified residue