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Figure 4.
Fig. 4. Electrostatic potential surface of ETF-QO viewed
from the membrane side. Entrance to the UQ-binding site (dashed
circle) and the UQ polyisoprene tail (green sticks) are shown.
The surrounding positively charged groups (blue patches)
probably are involved in interacting with the negatively charged
membrane phospholipid heads. The size of the entrance (dashed
circle) is  10 Å x 6 Å and
that of the hydrophobic plateau (blue parallelogram) is 24 Å
x 30 Å. Color codes are blue for positive (+8 kT), white
for neutral, and red for negative (–8 kT).
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