S-2-Aminododecanoic acid is a long-chain, non-proteinogenic amino acid featuring a dodecyl (C12) side chain attached at the 2-position and bearing an amino acid backbone with both amino and carboxyl functional groups. The molecule is specified as the S stereoisomer at the 2-carbon, and its hydrophobic alkyl side chain provides a nonpolar handle for studying structure-property relationships in peptide-like or amphiphilic assemblies. In synthetic and chemical biology workflows, it is used as a substrate building block for preparing modified amino acid derivatives and for incorporating hydrophobic residues into peptide analogues, surfactant-like conjugates, or analytical standards where controlled stereochemistry and long-chain behavior are relevant.
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