Cis-Retinal

 Trans-Retinal

Color Codes
 Click-hold mouse button to move structure.

C

H

N

O

P

S

Cl

F
 Click "x" box to toggle between structures.

Define MEP in new window
  Optimal View   Identify cis bond / ball & stick  Move manually to match left window   Identify trans bond / ball & stick
  Spacefill / ball & stick   MEP / ball & stick   Spacefill / ball & stick   MEP / ball & stick
  Wireframe / ball & stick   MEP (transparent) / ball & stick   Wireframe / ball & stick   MEP (transparent) / ball & stick
  Aldehyde / ball & stick     Aldehyde / ball & stick