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![[Figure 1]](jb5026fig1mag.jpg)
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Figure 1
Structure of the β-link and its relationship to the constituent motifs. (a) Type II β-turn. (b) G1β β-bulge. (c) β-Link. The residues are numbered either as for the β-turn (italic serif font) or the β-bulge (roman sans-serif font) or both. The two hydrogen-bonding residues of the β-bulge (3 and 4) that are common to the β-turn (1 and 2) are coloured pink. (d) The β-link in the context of two antiparallel strands of a β-sheet in staphylokinase (PDB entry 2sak; Rabijns et al., 1997  ). The residues of the β-link are represented using the CPK colour scheme with hydrogen bonds coloured red. Proximal residues and hydrogen bonds are coloured white. The numbering is as for the β-bulge, extended in the negative direction. Inset: diagrammatic representation of the hydrogen-bonding pattern with residues numbered as in (d). |
![[Figure 1]](jb5026fig1.jpg)
 | STRUCTURAL BIOLOGY |
ISSN: 2059-7983
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