Keywords: Cysteic acid.svg validSVG Skeletal formula of cysteic acid β-sulfoalanine Created using http //www acdlabs com/download/chemsk html ACD/ChemSketch 10 0 http //www inkscape org Inkscape and http //www vim org vim Own 2008-05-17 Fvasconcellos Intermediates Sulfonic acids Alpha-amino acids Sulfur amino acids |