Alpha Helix

 Click-hold mouse button to move structure.
Click "x" box to toggle between structures
.
  to end view   Labels/ Ball&Stick
  Spacefill / wireframe  H bonds (red lines) / wireframe
  Backbone / Ball&Stick  H bonds (red lines) w/backbone / wireframe
  Ribbons / wireframe H bonds w/ribbons / wireframe

Color Codes

C

 H

 N

 O

 P

 S

 Cl

 F
Different Protein - 10 alanines
H bonds (red lines) / wireframe