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A tripeptide (example Val-Gly-Ala) with
green marked amino end (L-Valine) and
blue marked carboxyl end (L-Alanine)

A tripeptide is a peptide derived from three amino acids joined by two or sometimes three peptide bonds.[1] As for proteins, the function of peptides is determined by the constituent amino acids and their sequence. The simplest tripeptide is glycylglycylglycine. In terms of scientific investigations, the dominant tripeptide is glutathione (γ-L-Glutamyl-L-cysteinylglycine), which serves many roles in many forms of life.[2]


See also[edit]


  1. ^ Nelson, David L.; Cox, Michael M. (2005). Principles of Biochemistry (4th ed.). New York: W. H. Freeman. ISBN 0-7167-4339-6.
  2. ^ Guoyao Wu, Yun-Zhong Fang, Sheng Yang, Joanne R. Lupton, Nancy D. Turner (2004). "Glutathione Metabolism and its Implications for Health". Journal of Nutrition. 134: 489-492. doi:10.1093/jn/134.3.489.CS1 maint: multiple names: authors list (link)