contains N6-glycyl-L-lysine sumoylated lysine A protein modification that effectively crosslinks the N6-amino of a peptidyl lysine with the carboxyl-terminal glycine of a sumo (Small Ubiquitin-related MOdifier) protein. none PSI-MOD K MOD:01149 natural N6-acylated L-lysine crosslinked glycine residue crosslinked L-lysine residue