n6,n6-dimethyl-lysine true lysine derivative Lys(y) epsilon-dimethyllysine N6,N6-dimethyl-L-lysine N(zeta)-dimethyllysine PSI-MI MLY dimethyllysine (S)-2-amino-6-dimethylaminohexanoic acid MI:0166 [K:meth_2] Residue modification. OBSOLETE remap to MOD:00084.