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Figure 4.
Figure 4. The F Pockets of B3501 and B53Both panels are
viewed through the α2 helix and, as in Figure 3, the MHC main
chain is represented in green, key side chains are shown in
white, dashed lines indicate hydrogen bonds, and light blue
spheres mark the positions of tightly bound water molecules.(A)
The B3501 F pocket. The polymorphic residue (Gly) at position 83
is not visible from this angle but is solvent exposed and
located on a turn of the α1 helix adjacent to residue 82.(B)
The B53 F pocket.
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