Figure 6.

Speculated combinations of y11-2 (A), y11 (B), and CD-5 (C) mutant and wild-type ChlI1a and ChlI1b subunits arranged into hexameric rings. The four hexameric rings in each box depict four of the many possible combinations of the ChlI1a (white triangles) and the ChlI1b (gray triangles) subunits assembling together to form the hexameric ring. The resulting chlorophyll phenotypes from the various combinations of wild-type and mutant proteins are indicated by the green, light-green, or yellow background colors. Solid lines around the subunits indicate wild-type proteins, whereas dashed lines around the subunits indicate mutant proteins. A blue circle in the center of the hexamer indicates the hexamer is capable of wild-type activity.