Fig. 9. Schematic representation of the primary structure of a Kazal-type protein. Disulphide bridging pattern of the conserved cysteine (C) residues is indicated by solid lines. Asterisks show the position of the Pfam consensus pattern: C–x(7–10)–C–x(6)–Y–x(3)–C–x(2–6)–C. All six cysteines are conserved in mature vasotab, although the spacing between cysteine residues within the consensus pattern is unusual: C–x(7)–C–x(13)–F–x(3)–C–x(6)–C. The active site residue of protease inhibitors is marked by a hash (#).