(S)-2-Amino-4-cyclohexylbutanoic acid is a chiral amino acid derivative. The (S) indicates that the molecule has the (S)-enantiomer configuration at its chiral center. This compound consists of a butanoic acid backbone with an amino group at the 2-position and a cyclohexyl group at the 4-position. The cyclohexyl group introduces hydrophobicity and bulk to the structure, which can impact the peptide's conformation and interactions. This amino acid is used in peptide synthesis to impart specific structural characteristics, influencing the biological activity or stability of the resulting peptides.