Figure 5.
Detailed representation of one of the12-stranded parallel S1 barrels that comprise the lining of the pore. Side chains of residues extending into the pore have been added and colored by element. (A) Side view in which five strands nearest the viewer have been removed to reveal the lining of the pore. Negatively and positively charged residues inside the barrel are labeled red and blue respectively. (B) View down the axis of a portion of the pore from D7 through E11. Space-filled spheres illustrate positions of Ca2+ ions prior to MD simulations. This model has six-fold symmetry about the axis of the pore/barrel.