Collagen

 Click-hold mouse button to move structure.
Click "x" box to toggle between structures
.
  to end view   One Chain / wireframe
  Model (ball & stick / wireframe)   Three chains / wireframe
  Proline / wireframe   Ribbons / wireframe
  Glycine / wireframe) pro-gly-arg / wireframe)

Color Codes

C

 H

 N

 O

 P

 S

 Cl

 F
Backbone / Ball&Stick