Question

Which terminus c or n of alpha helix is likely to interact with dna backbone?

Answer 1

A single amino acid is shown to the right. The "side chain" is the portion that is different in each of the 20 different amino acids. Peptide bonds hold the adjacent amino acids together in the polypeptide chain. The figure to the right shows two amino acids held together by a peptide bond (in red).

Answer 2

Answer:

One part of the domain contains a region that mediates sequence specific DNA binding properties via basic amino acids such as arginine and lysine. These basic residues can either interact ionically with the negatively charged backbone phosphate groups or via hydrogen bonds with the bases.