crosslinked residues with loss of water 2-(2-aminosuccinimidyl)-3-sulfanylpropanoic acid (Asp) (2R)-2-[(3S)-3-amino-2,5-dioxopyrrolidin-1-yl]-3-sulfanylpropanoic acid -18.010564804077148438 -18.020000457763671875 2-(2-aminosuccinimidyl)-3-sulfanylpropanoic acid 200.0255584716796875 200.2100067138671875 A protein modification that crosslinks an aspartic acid and the following cysteine residue with the formation of (2-aminosuccinimidyl)-3-sulfanylpropanoic acid and the loss of a water molecule. C 0 H -2 N 0 O -1 S 0 C 7 H 8 N 2 O 3 S 1 C, D Cross-link 2. MOD:01939 PSI-MOD aspartimide cysteine natural 2-(2-aminosuccinimidyl)-3-sulfanylpropanoic acid crosslinked L-aspartic acid residue