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Distribution of residue centroids and hydrophobicity profiles of E. coli quinol-fumarate reductase, 1KF6. (A) A view along the axis normal to the plane of the membrane. (B) A view canted by 80° from the symmetry axis. (C) The hydrophobicity profile H(d) calculated with the Eisenberg hydrophobicity scale. (D) The hydrophobicity profile H(d) calculated with the GES hydrophobicity scale. The solid and the dashed lines in C and D are calculated in steps of 2 Å and of 3 Å, respectively.
