A dihedral angle is determined by 4 atoms. These 4 determine Phi (φ). Here, the angle is 0º.

TLS Online TPP Program

#Id: 8453

#Unit 1. Molecules and their Interaction Relevant to Biology

TLS Online TPP Program

#Id: 8454

#Unit 1. Molecules and their Interaction Relevant to Biology

The α helices of proteins have an average length of ∼12 residues, which corresponds to more than three helical turns, and a length of ∼18 A.

TLS Online TPP Program

#Id: 8455

#Unit 1. Molecules and their Interaction Relevant to Biology

α helices are common components of polypeptide chains, they need to be of a certain minimum length of 6 amino acid

TLS Online TPP Program

#Id: 8456

#Unit 1. Molecules and their Interaction Relevant to Biology

The α helices have rotation of 100 degree per amino acid

TLS Online TPP Program

#Id: 8457

#Unit 1. Molecules and their Interaction Relevant to Biology

Gly is often observed at the C-cap & N cap both positions, Pro at the Ncap and Asp and Glu at N2 and N3.

TLS Online TPP Program

#Id: 8458

#Unit 1. Molecules and their Interaction Relevant to Biology

Helix can form in polypeptides consisting of either L- or D-amino acids but never exist to contain both types.