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. 2021 Sep 27;77(Pt 10):1251–1269. doi: 10.1107/S2059798321009025

Figure 4.

Figure 4

The active site of the heme centre of ascorbate peroxidase (APX). (a) Compound II of APX with a positively charged His42 (PDB entry 5jpr, H/D exchanged; Kwon et al., 2016). 2F oF c NSLD map (σ = 1.50) is displayed as a blue mesh; H and D atoms are displayed in white and turquoise, respectively. (b) A neutral Arg38 residue in ascorbate-bound APX (PDB entry 6xv4, perdeuterated; Kwon et al., 2020). 2F o − F c NSLD map (σ = 1.00) is displayed as a blue mesh; H and D atoms are displayed in white and turquoise, respectively.