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Figure 4
Typical X-ray topographic images of ferritin crystals taken with [{\overline 1}{\overline 1}1] reflection at W values of (a) −198.58 and (b) −132.38, respectively. The numbers of black arrows correspond to those of dark-line contrasts for equal-thickness fringes. The contrast profiles of (c) measured and (d) calculated intensity of the fringe contrasts at the yellow rectangles in (a) and (b).

IUCrJ
Volume 7| Part 4| July 2020| Pages 761-766
ISSN: 2052-2525
https://doi.org/10.1107/S2052252520007393