general only; prefer specific protein or specific precoordinated protein group terms such as EYE PROTEINS; BACTERIAL PROTEINS; DIETARY PROTEINS; etc.; primary protein structure = AMINO ACID SEQUENCE; protein structure referring to protein architecture = PROTEIN CONFORMATION or its specifics: PROTEIN STRUCTURE, SECONDARY; PROTEIN STRUCTURE, TERTIARY; or PROTEIN STRUCTURE, QUATERNARY

Linear POLYPEPTIDES that are synthesized on RIBOSOMES and may be further modified, crosslinked, cleaved, or assembled into complex proteins with several subunits. The specific sequence of AMINO ACIDS determines the shape the polypeptide will take, during PROTEIN FOLDING, and the function of the protein.

/metabolism was PROTEIN METABOLISM 1963-65; PROTEIN METABOLISM DISORDERS was heading 1963-64