Figure 10. Cartoon representation of the siRNA-2b nucleoprotein complex with the localization of those eight mutants whose bearing altered phenotype on Nicotiana clevelandii plants.

Aa triplets which are involved in the putative cell-to-cell movement related interactions are red while the other six mutations are colored green (A). Molecular surface representation of the siRNA-2b nucleoprotein complex. siRNA surfaces are colored light blue while 2b protein subunits are grey. Red protein surface regions indicate the three-dimensional localizations of those mutations which lead to movement-deficient behavior (B).