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Figure 4
Length of the heme Fe–His bond [A and B molecules are shown in (a) and (b), respectively] as a function of the step size within a scan line (left) and between scan lines (right). ID29 data (February 2024) are shown as black circles; Cristallina-MX data are depicted in gray (June 2023) and blue (September 2023). The SACLA data (red) show the results of the data collected by Ebrahim et al. (2019View full citation) after being reprocessed in this study. Error bars were derived by bootstrapping. The plotted values are listed in Supplementary Table S3. The Fe–His bond length derived from the February 2024 ID29 data is longer than that obtained from the Cristallina-MX-derived structures. The effect is larger for the B molecule.

IUCrJ
Volume 12| Part 6| November 2025| Pages 692-709
ISSN: 2052-2525
https://doi.org/10.1107/S2052252525008371