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Figure 9
Electron-density map of purple membrane projected onto a membrane plane. It was calculated with diffraction amplitudes up to the (113) reflection, a resolution of 4.2 Å. The envelope shown by the dashed line shows the border of one BR monomer, and the characters A–G are the names of seven transmembrane α-helices. The triangle symbols denote the positions of threefold rotational symmetry points. [From Fig. 3 in Oka et al. (2006BB29).]

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ISSN: 2053-2733
Volume 64| Part 1| January 2008| Pages 169-180
https://doi.org/10.1107/S0108767307043735
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