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. 2023 Jun 9;14:3416. doi: 10.1038/s41467-023-39140-x

Fig. 1. The structure of AxqNOR and its new features identified in a high-resolution cryoEM map.

Fig. 1

a cryoEM map for the measured Coulomb potential of the scattered atoms of AxqNOR determined by single-particle cryoEM to 2.2 Å resolution. Map colored by chain (A in green and B in blue). b Dimeric AxqNOR in the plane of the lipid bilayer (red lines) colored by chain (A in green and B in blue), with waters colored as red spheres, DTM (decyl-thio-maltoside) detergent and LOP (lauryl oleyl phosphatidyl-ethanolamine (LOP) as magenta sticks. c AxqNOR catalytic core formed of two adjacent heme groups linked by a calcium ion (green sphere) shown within the cryoEM density map. Iron ions are shown as orange spheres, water molecules as red spheres, and protein and heme groups as green sticks. All density maps contoured to a sigma level of 0.034 except for that corresponding to water molecules and Glu490, which is contoured to 0.020. d Map of AxqNOR cryoEM density colored by local resolution.