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Figure 2
Side-by-side haem environments. Cat_T dark blue, cat_L light blue, cat_H pink. The close similarity of cat_L and cat_T and the slight tilt of the cat_H haem are clear. The distances between the two haem-pocket water molecules and the active-site residues are labelled.

IUCrJ
Volume 13| Part 6| November 2026| Pages 807-818
ISSN: 2052-2525
https://doi.org/10.1107/S2052252526008845