Figure 4
The bound menaquinone (MK) at the MQ2 site near the bL heme in D. gigas QFR. (a) A stereo view of the bound MK with the electron density. The SIGMAA weighted Fo − Fc density maps are shown as green mesh at σ 1.2. MK and hemes are shown as yellow and magenta sticks, respectively, in subunit C as cartoon helices. (b) The hydrophobic pocket is formed with Trp36, Ala37, Met40 and Leu41, which are colored grey. Tyr63 (green stick) of subunit C forms a hydrogen bond (dashed line) with MK (yellow stick). Hemes are shown as magenta sticks.
