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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: 1CI6
TRANSCRIPTION FACTOR ATF4-C/EBP BETA BZIP HETERODIMER
Chain
A
Na(+):neurotransmitter symporter (Snf family) - Aquifex aeolicus VF5