2-aminosuccinimide ring crosslinked residues 2-(2-aminosuccinimidyl)-3-sulfanylpropanoic acid 154.037841796875 154.1300048828125 A protein modification that forms (2-aminosuccinimidyl)-3-sulfanylpropanoic acid by crosslinking either an aspartic acid residue or an asparagine residue with the following cysteine residue. C 6 H 6 N 2 O 3 C, X Cross-link 2; this cross-link is formed by the condensation of an aspartic acid residue or an asparagine residue with the alpha-amido of the following residue. MOD:01945 PSI-MOD hypothetical crosslinked L-cysteine residue