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: 6TRC
Cryo- EM structure of the Thermosynechococcus elongatus photosystem I in the presence of cytochrome c6
Chain
A
Photosystem I P700 chlorophyll a apoprotein A1 - Thermosynechococcus vestitus BP-1