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Figure 3.
Figure 3. Representation of the two equivalent positions of
Tyr99. The generally observed position (shown in light gray)
enables hydrogen-bonding to Tyr9 and usually to the P3 nitrogen,
while the alternative orientation (dark) in HLA-B*3501 allows
interaction with the side-chain of aspartate at position 5 of
the peptide (P D5).
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