| Main Article | Discussion | Related Articles [?] | Bibliography [?] | External Links [?] | Citable Version [?] | | | | | | | | This editable Main Article is under development and subject to a disclaimer. [edit intro] (CC) Image: David E. Volk Structure of glycine, the smallest amino acid. Glycine is the smallest of the twenty common amino acids used by living organisms to build proteins. The side chain, or residual group of glycine is a hydrogen atom. It is one of the non-polar amino acids. ## References[edit]