For the protein sequence given below which is known as an alpha-helix:

1)Ile-Arg-Lys-Leu-Ala-Asp-Ile-Leu-Thr-Arg-Leu-Trp-Lys-Val

How can you calculate the maximum possible number of turns of this a-helix?

(you should explain your way of thinking)

2)

Examine and think carefully about the protein sequence given below which is known as an a-helix:

Ile-Arg-Lys-Leu-Ala-Asp-Ile-Leu-Thr-Arg-Leu-Trp-Lys-Val

Speculate about the location of this a-helix after figuring out the extraordinary arrangement of the amino acids in this sequence.

3)Draw the complete structure of the pentapeptide EMRTG in its predominant form at pH=1 in trans configuration. Calculate the net charge on this pentapeptide at this pH and distinguish all the peptide bonds.