Some elements exist naturally as molecules. For example, hydrogen and oxygen exist as two-atom molecules.

TLS Online TPP Program

#Id: 8452

#Unit 1. Molecules and their Interaction Relevant to Biology

If the α helix lies parallel to the direction of the major groove, the straight α helix can contact 4–6 bp before the bases curve out of the plane of the amino acids in the α helix.

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.