amidated residue modified L-aspartic acid residue 4-amidated L-aspartic acid (2S)-2-amino-4-butanediamic acid -0.98000001907348632812 -0.98401600122451782227 114.04293060302734375 114.09999847412109375 2,4-bis(azanyl)-4-oxobutanoic acid 2,4-diamino-4-oxobutanoic acid 2-amino-3-carbamoylpropanoic acid 2-amino-4-butanediamic acid 2-aminosuccinamic acid 2-aminosuccinic acid 4-amide 4NAsp A protein modification that effectively converts an L-aspartic acid residue to L-asparagine. C 0 H 1 N 1 O -1 C 4 H 6 N 2 O 2 D L-asparagine MOD:01185 MOD_RES Amidated aspartic acid PSI-MOD alpha-amino-beta-carbamylpropionic acid alpha-aminosuccinamic acid aspartic acid 4-amide aspartic acid beta-amide beta-asparagine natural