nucleotide or nucleic acid modified residue uridylated residue 306.025299072265625 306.170013427734375 5'phos Uridinyl A protein modification that effectively crosslinks an amino acid residue and 5'-phosphouridine through either a phosphodiester or a phosphoramide bond. C 9 H 11 N 2 O 8 P 1 From DeltaMass: (name misspelled "5'phos Uridinyl" and formula incorrect, N and O reversed) Average Mass: 306 Formula: C9H11O2N8P1 Monoisotopic Mass Change: 306.025 Average Mass Change: 306.17 MOD:01166 PSI-MOD PhosphoUridine Unimod:417 X uridine phosphodiester