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Figure 2.
Figure 2. Interactions of PA-IIL with calcium ions and fucose.
a, Stick representation of the amino acids involved in binding.
Ca^2+ coordination bonds are shown as solid orange lines;
hydrogen bonds, as dashed green lines. Color coding is red,
oxygen; blue, nitrogen; black, carbon; and pink, Ca^2+. b,
Electrostatic surface representation (color coding from violet
for negative to orange for positive) of the PA-IIL-binding site
with Ca^2+ (large pink spheres) and fucose (stick model). c,
Stereo view of the final 2F[o] - F[c] electron density map
around the fucose molecule bound to subunit A. The density is
contoured at 1.0  .
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