BIOMOLECULES AND ENZYMES

Detailed explanation-1: -The Ramachandran plot is a plot of the torsional angles-phi ()and psi ()-of the residues (amino acids) contained in a peptide. In sequence order, is the C(i-1), N(i), Ca(i), C(i) torsion angle and is the N(i), Ca(i), C(i), N(i+1) torsion angle. The plot was developed in 1963 by G. N. Ramachandran, et.

Detailed explanation-2: -Each amino acid contains two bonds that can readily rotate-this includes the phi angle and the psi angle.

Detailed explanation-3: -In proteins the two torsion angles and describe the rotation of the polypeptide chain around the two bonds on both sides of the C atom. In a polypeptide the main chain N-C alpha and C alpha-C bonds relatively are free to rotate. These rotations are represented by the torsion angles phi and psi, respectively.

Detailed explanation-4: -The alpha carbon (C) in the center of each amino acid is held in the main chain by two rotatable bonds. The dihedral (torsion) angles of these bonds are called3 Phi and Psi (in Greek letters, and ).