Antioxidant peptide A TFA is a short peptide, which contains alternative aromatic or sulfur-containing amino acid. The side chains of Antioxidant peptide A are believed to contribute to strong radical scavenging activities of peptides in the cancer cell[1].
[1]. Kalmodia S, et al. Bio-conjugation of antioxidant peptide on surface-modified gold nanoparticles: a novel approach to enhance the radical scavenging property in cancer cell. Cancer Nanotechnol. 2016;7:1.