FIG 4.

Comparisons of the structures of CNV, CLSV, and RCNMV C subunits. In both panel A and panel B, the atomic structure of CNV is represented by gray ribbons whereas CLSV and RCNMV are colored from blue to red as the chain extends from the N terminus to the C terminus. In panel B, the area marked with arrows and a circled “A” shows the one region of disorder that was of insufficient quality to build a model. The other area noted with a circled “B” shows the marked differences between the structures of RCNMV and CNV. While the N terminus of CNV bends sharply to form a putative zinc ion binding site, RCNMV extends into an adjacent subunit and forms extensive β-strand interactions.