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Figure 1.
Fig. 1. Polypeptide -fold and electron transfer distances
in QFR. A, ribbon diagram views of the E. coli QFR separated by
a 90° rotation about a vertical axis. The flavoprotein is
shown in blue, the iron protein is in red, and the transmembrane
anchors are in dark green (FrdC) and purple (FrdD). The
approximate boundary of the membrane is indicated with a black
line. B, inter-cofactor distances of the E. coli enzyme. The
known cofactors are superimposed onto an outline of the enzyme.
C, inter-cofactor distances in the W. succinogenes enzyme. The
b-type hemes associated with the membrane anchor reduce the
electron transfer distance between a predicted distal
quinol-binding site (data not shown). Figs. 1, 3, and 4 were
made using Molscript (56), Bobscript (57), and Raster3D (58).
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