alpha helix

Java version

HTML 5 version (does not required Java)

I. Introduction

This isolated alpha helix is from an "antifreeze" protein that helps keep the blood of cold water fish from freezing.  Note that the side chains are pointing away from the helical axis.

For more information see Biochemistry Online: Chapter 2C - Understanding Protein Conformation

II. General Structure

Backbone and sidechains
Ball and Stick showing H bonds
Cartpon with H bonds and Wireframe
Dot surface with Wireframe