BK Channel (IMAGE)
Caption
Four protein subunits assemble themselves into a rough cube with the pore in the middle and voltage sensors hanging off the corners. (Only two subunits are shown here.) Helices line the pore, interlocking at the bottom to close it. The tail ends of the protein, which contain the calcium binding sites (Ca2+), end up in a ring-like stucture beneath the pore called the cystolic domain.
Credit
Jianmin Cui
Usage Restrictions
None
License
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