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. 2009 Dec 25;66(Pt 1):2–7. doi: 10.1107/S1744309109044741

Figure 5.

Figure 5

Binding of methyl red to paAzoR1. (a) Binding of methyl red to Y131F-mutant paAzoR1. The blue electron density represents the refined 2F o − F c map contoured at 1σ. The green electron density represents the first F o − F c map calculated after initial phasing contoured at 2σ, showing the position of methyl red binding. (b) Binding of methyl red to wild-type paAzoR1. The structure is based upon PDB entry 2v9c. As in (a) blue electron density represents the refined 2F o − F c map. In both (a) and (b) methyl red is shown with pink C atoms, while FMN is shown with yellow C atoms. (c) Overlaid structures of methyl red binding to wild-type and Y131F-mutant paAzoR1. Side chains and methyl red molecules have the same colour C atoms. Blue C atoms are for wild-type paAzoR1. Green C atoms are for Y131F-mutant paAzoR1.