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Figure 2.
Fig. 2. The internal hydrophilic cavity of LacY. The surface
model and electrostatic potential were calculated with the
program GRASP (38). The polar surfaces are colored blue
(positively charged) and red (negatively charged). The black
spheres denote TDG. (A) View parallel to the membrane. For
clarity, helices V and VIII have been removed. (B) View along
the membrane normal from the cytoplasmic side.
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