The Structure of Proteins: Two Hydrogen-Bonded Helical Configurations of the Polypeptide Chain Pauling, Linus ; Corey, Robert B. ; Branson, H. R. Abstract Publication: Proceedings of the National Academy of Science Pub Date: April 1951 DOI: 10.1073/pnas.37.4.205 Bibcode: 1951PNAS...37..205P