Question

A small generic section of the primary structure of an a helix is given below. ?amino acid1 ?amino acid2 ?amino acid3 ?amino acid4 ?amino acid5 ?amino acid6 ?amino acid7? (a) Which amino acid residue?s backbone forms a hydrogen bond with the backbone of the sixth (6th) residue? Choose the correct residue from the drop-down menu. amino acid Select answer (b) Which of the following peptide segments is most likely to be part of a stable a helix at physiological pH? (c) How many hydrogen bonds can be formed within the backbone of 7 residues? Do not count the hydrogen bonds between this section and outside the section.

Please answer all parts a)-c) thouroughly & clearly.

Answer 1

a)
Its n+4 rule
Answer: 2rd
3 forms with 7
2 with 6
1 with 5
and so on

b)
Answer:
-Glu-Leu-Ala-Lys-Phe-

c) Answer : 3

7 with 3

6 with 2

5 with 1