The enzyme carbonic anhydrase (CA) is globular in shape. The

following image is generated by an application called JSmol.

It will allow you to look at the protein and rotate it.

By using the left mouse button you will be able to rotate the

protein. A right click will take you to further options.

Please note the rounded shape of the protein.

Atom colours:
Carbon - grey; Oxygen - red; Nitrogen - blue; Sulfur - yellow