Protein primary structure

Protein primary structureProtein secondary structureProtein tertiary structureProtein quaternary structure
The image above contains clickable links
The image above contains clickable links
This diagram (which is interactive) of protein structure uses PCNA as an example. (PDB: 1AXC​)

Protein primary structure is the linear sequence of amino acids in a peptide or protein.[1] By convention, the primary structure of a protein is reported starting from the amino-terminal (N) end to the carboxyl-terminal (C) end. Protein biosynthesis is most commonly performed by ribosomes in cells. Peptides can also be synthesized in the laboratory. Protein primary structures can be directly sequenced, or inferred from DNA sequences.

  1. ^ SANGER F (1952). "The arrangement of amino acids in proteins". In M.L. Anson; Kenneth Bailey; John T. Edsall (eds.). Advances in Protein Chemistry. Vol. 7. pp. 1–67. doi:10.1016/S0065-3233(08)60017-0. ISBN 9780120342075. PMID 14933251.