Chapter 6, Problem 9P

Answers to all problems are at the end of this book. Detailed solutions are available in the Student Solutions Manual, Study Guide, and Problems Book.

Evaluation of $\alpha$-Helices in Proteins The hem agglutinin protein in influenza virus contains a remarkably long $\alpha$-helix, with 53 residues.

1. How long is this $\alpha$-helix (in nm)?
2. How many turns does this helix have?
3. The typical residue in an $\alpha$-helix is involved in two H bonds. How many H bonds are present in this helix?