Figure 1.

(A) Part of powder diffraction patterns for polyhedra of AcMNPV, CPV1, and CPV5. The nearly identical spacing of the intensity rings with a small opening angle shows the similarity of lattice constants of the different samples. Comparing the rings of CPV1 and CPV5, the small difference in the lattice constants is clearly visible, emphasising the precision of powder diffraction analysis. (B) The predicted peak positions for a cubic body-centered lattice of 103.7 ± 0.05 Å lattice constant, agree very well with the powder pattern measured for AcMNPV polyhedrin.