Extended Data Figure 6: X-ray-induced photoreduction of the HODM haem subunit in complex with DMA and O2.
From: An oxidative N-demethylase reveals PAS transition from ubiquitous sensor to enzyme

The initial spectrum recorded before X-ray illumination (ESRF beamline ID14-1 (wavelength 0.934 Å)) was subtracted from the post illumination spectrum. A shift in the α/β bands is recorded with a decrease at 575 nm and an increase at 556 nm. This corresponds to formation of the ferrous species (merged α/β band at 556 nm).