amidated residue modified L-aspartic acid residue 4-amidated L-aspartic acid -0.98000001907348632812 -0.98401600122451782227 114.04293060302734375 114.09999847412109375 (2S)-2-amino-4-butanediamic acid 2-aminosuccinamic acid 2-amino-4-butanediamic acid 2,4-diamino-4-oxobutanoic acid MOD:01185 aspartic acid beta-amide aspartic acid 4-amide alpha-aminosuccinamic acid H 1 N 1 O -1 C 4 H 6 N 2 O 2 2-amino-3-carbamoylpropanoic acid 4NAsp 2-aminosuccinic acid 4-amide A protein modification that effectively converts an L-aspartic acid residue to L-asparagine. natural L-asparagine MOD_RES Amidated aspartic acid 2,4-bis(azanyl)-4-oxobutanoic acid alpha-amino-beta-carbamylpropionic acid PSI-MOD beta-asparagine none D