Figure 4 - full size

Figure 4.
Surface features of sclerostin. Panels A and B show contact surface views of sclerostin, which are colored according to electrostatic potential, with areas of significant positive charge shown in blue, significant negative charge in red, and neutral in white. The orientation of the protein in panel A is equivalent to the ribbon representation in panel C. The location of the hydrophobic patch on the concave surface of the extended finger-like structures is indicated by the arrow. Panels C and D show a ribbon representation of sclerostin, with the positions of the basic side chains from arginine and lysine residues highlighted.