N6-(phospho-5'-guanosine)-L-lysine (2S)-2-amino-6-(5'-guanosine phosphonamino)hexanoic acid 345.04742431640625 345.209991455078125 473.14239501953125 473.3800048828125 5'-guanylic-N6-L-lysine 5'phos Guanosyl A protein modification that effectively crosslinks an L-lysine residue and 5'-phosphoguanosine through a phosphoramide ester bond to form N6-(phospho-5'-guanosine)-L-lysine. ACT_SITE N6-GMP-lysine intermediate C 10 H 12 N 5 O 7 P 1 C 16 H 24 N 7 O 8 P 1 From DeltaMass: Average Mass: 345 Formula:C10H12O5N7P1 Monoisotopic Mass Change:345.047 Average Mass Change:345.209 References:PE Sciex K L-lysine monoanhydride with 5'-guanylic acid MOD:00233 N(zeta)-5'-guanylic-lysine N6-(5'-guanylyl)-lysine N6-(phospho-5'-guanosine)-L-lysine N6-L-lysine 5'-guanosine phosphoramidester N6GMPLys PSI-MOD Phosphoguanosine Unimod:413 epsilon-5'-guanylic-L-lysine lysine guanosine-5'-monophosphate natural phospho-guanosine modified L-lysine residue guanylated residue