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Figure 4.
Figure 4. Schematic representation of the hydrogen-bonding
pattern of the antiparallel b strands in birch pollen profilin.
The dashed lines represent hydrogen bonds. The b sheet contains
two irregularities in the hydrogen-bonding pattern; a `classic'
b bulge (residues Trp35 and Ala36) and a three-residue b bulge
(Ile77, Gln78, Gly79).
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