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Cryo-EM reconstruction of CPV at 21 Å resolution showing (a) a surface-shaded representation (adapted from Chipman et al., 1996 ▶) and (b) a central section (adapted from Tsao et al., 1991 ▶). The virus is about 280 Å in diameter. These reconstructions were based on icosahedral symmetry averaging, as was also the determination of the CPV crystal structure.
