It is comprised of three rules that state that peptide bonds are planar, that all amino acid residues are equivalent with respect to backbone conformations, and that each nitrogen-oxygen bond is at a fixed distance.  
This concept was verified by Herman Branson, though later work by Ramachandran, who showed the need for nonpolar bonds in cyclic peptides, and Pople, who showed that gas phase peptide bonds can rotate as much as forty degrees, demonstrated this idea's weakness.  It is comprised of three rules that state that peptide bonds are planar, that all amino acid residues are equivalent with respect to backbone conformations, and that each nitrogen-oxygen bond is at a fixed distance.  FTP, identify this concept named after its two discoverers that governs the secondary structure of proteins.
This concept was verified by Herman Branson, though later work by Ramachandran, who showed the need for nonpolar bonds in cyclic peptides, and Pople, who showed that gas phase peptide bonds can rotate as much as forty degrees, demonstrated this idea's weakness.  
Corey-Pauling rules