C. Ramakrishnan
= C. Ramakrishnan
{c}
<C. Ramakrishnan> helped investigate the geometry of <polypeptide> chains through backbone torsion angles. Steric restrictions rule out some angle combinations, providing a structural constraint that a <protein> model must satisfy in addition to its sequence.<Stereochemistry of polypeptide chain configurations by G. N. Ramachandran and others>[1963, backbone torsion angles and excluded configurations]{ref}