FIG 1.

Organization of the Tombusviridae capsid. The top panel shows a stereo image of a portion of the CNV capsid. The A, B, and C subunits of one icosahedral asymmetric unit are colored blue, green, and red, respectively. The icosahedrally related copies of the A, B, and C subunits are colored in light hues. Also noted are the locations of one set of 5-fold, 3-fold, and 2-fold axes. The bottom panel shows a stereo image of the C subunit of CNV. The P domain is shown in brick red, the shell in blue, and the arm in green. The locations of conserved prolines and a metal ion binding histidine, discussed in the Fig. 5 legend, are also shown.