Figure 4 - full size

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).