WebGL does not seem to be available.

This can be caused by an outdated browser, graphics card driver issue, or bad weather. Sometimes, just restarting the browser helps. Also, make sure hardware acceleration is enabled in your browser.

For a list of supported browsers, refer to http://caniuse.com/#feat=webgl.

Sequence Annotations in 3D: 2DG5
Crystal Structure of Gamma-glutamyl transpeptidase from Escherichia coli in complex with hydrolyzed Glutathione
Chain
A
Glutathione hydrolase proenzyme - Escherichia coli K-12