The Alpha-Helix

1: Underlying Structure

Show covalent bonds.

Hydrogen atoms off/on.

Show alpha carbons.

Sidechains off/on.

Trace alpha carbons.

Show 3.6 a.a. per turn.

2: Stabilization

Single hydrogen bond.

All hydrogen bonds.

Hydrophobic interactions

Take cross-sections:

In Out

3: Amphipathic helices

Hydrophilic side chains.

Hydrophobic side chains.


Beta-Sheet Tutorial
Molecules in Motion