derives from N-acylated residue 4x(1)H,4x(12)C-labeled N6-succinyl-L-lysine (12)C 10 H 16 N 2 O 4 (12)C 4 (1)H 4 O 3 100.01604461669921875 100.01999664306640625 228.1100006103515625 228.1110076904296875 A protein modification that effectively converts an L-lysine residue to 4x(1)H,4x(12)C-labeled N6-succinyl-L-lysine. K MOD:01314 PSI-MOD Succinic anhydride labeling reagent light form (K) Succinyl Unimod:64 artifact isotope tagged reagent derivatized residue N6-succinyl-L-lysine