Fig. 6: Photoconversion of TtCBD in form 1 and 2 crystals in crystallo under aerobic conditions.

a Stick representation for the most displaced cobalamin (i.e. chain D) of I^O2 for crystal form 1. The grey mesh depicts the composite omit 2F_o–F_c density contoured at 1 σ, and the interactions made with the Co atom shown as dashed lines. The red mesh shows the anomalous density for the Co atom contoured at 3.0 σ. b Comparison of the displaced cobalamin of illuminated structures for form 1 (brown I^O2 and yellow I^anaer; chain D) and form 2 (cyan I^O2; chain A).