HTML 5 version (does not require Java; downloads and moves
Here is the structure of myoglobin, an oxygen-binding protein.
The globin fold is found in many proteins and seems to represents
natures way of designing a protein which can bind heme groups and
serve as an oxygen carrier. It contains 8 helices (A-H) connected
by short loops. The helices pack in a way that sequential helices
are not packed next to each other. The helices form a hydrophobic
binding pocket for the heme.
For more information see
Biochemistry Online: Chapter 5C -
Model Binding Systems
II. General Structure
Backbone and Side chains
Heme and Trp sidechains (in Blue, Spacefill)
Cartoon, H bonds and wireframe
Dot surface and Wireframe