N6-propylamino-poly(propylmethylamino)-propyldimethylamine-L-lysine N6-propylamino-poly(propylmethylamino)-propyldimethylamine-L-lysine silaffin polycationic lysine derivative natural MOD:00283 A protein modification that effectively converts an L-lysine residue to an N6-propylamino-poly(propylmethylamino)-propyldimethylamine-L-lysine. N6-[3-([(omega)-(dimethyl)aminopropyl-poly(3-[methylamino]propyl)]amino)propyl]lysine lysine derivative Lys(x) (alpha)- ([([(5S)-5-amino-5-carboxypentyl]amino)propyl][(methyl)amino])-(omega)-methyl poly[propane-1,3-diyl(methylimino)] none MOD_RES N6-poly(methylaminopropyl)lysine PSI-MOD K modified L-lysine residue