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: 4A3B
RNA Polymerase II initial transcribing complex with a 4nt DNA-RNA hybrid
Chain
A
Gag-Pol polyprotein - Human immunodeficiency virus type 1 BH10