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Figure 2
Self-rotation function calculated from diffraction data of type A crystals at κ = 180°, using data between 20.0 and 4.0 Å resolution and the program POLARRFN (Collaborative Computational Project, Number 4, 1994BB6). The horizontal and vertical polar coordinates of the rotation axis are ω (0–90° from centre to edge of circle) and φ (plotted around the circumference as shown in the figure). The peaks at φ = 0, 90, 180 and −90° on the circumference arise from crystallographic twofold of the space group.

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