There are 20 amino acids that make up proteins and all have the same basic structure, differing only in the R-group or side chain they have. Amino acids are in an equilibrium between two acids with ...

This image illustrates the general structure of an amino acid.The central carbon ... glutamine, glycine, proline, serine, and tyrosine. Amino acids can be joined together through peptide bonds to form ...

demonstrating in multiple animal species that there is likely a causative relationship between depression severity and serum levels of the nonessential amino acid proline, which the study finds depend ...