The building blocks of proteins are amino acids, which are small organic molecules that consist of an alpha (central) carbon atom linked to an amino group, a carboxyl group, a hydrogen atom ...

An aliquot of the ketoacid extract was also hydrogenated in an acid medium in an electrolytic desalter; partition chromatography was then used to identify the regenerated amino acids. Note the ...

Proteins have four levels of structure: primary (amino acid sequence), secondary (local folding patterns like alpha helices and beta sheets), tertiary (overall 3D shape), and quaternary (assembly of ...