Figure 2

Structure of RSV NCp12 bound to the muPsi packaging signal. Structure of the Rous sarcoma virus nucleocapsid protein NCp12 bound to the cognate muPsi RNA packaging signal. The backbone of NC is shown as a ribbon (slate) and the zinc, cysteine and histidine groups are colored silver, yellow and blue, respectively. Coloring of secondary structural elements of the muPsi RNA are: SLA, purple; SLB, green; SLC, brown; O3, red; linker segments, orange (20).