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. Author manuscript; available in PMC: 2012 Feb 2.
Published in final edited form as: Chem Rev. 2004 Aug;104(8):3587–3606. doi: 10.1021/cr0304121

Figure 13.

Figure 13

(a) Superimposition of 100 calculated backbone structures of the trans-membrane helix of Vpu. (b) A 90° rotation of panel part a to the vertical axis. (c) A 30° tilt of panel part b toward the reader. The structures were obtained by structural fitting of the experimental solid-state NMR data and are aligned for the best overlap of residues Ile8–Val25. The average tilt of about 13° relative to the membrane normal and a slight kink near residue Ile17 are apparent when it is noted that the plane of the average tilt of the helix does not coincide with the plane of the kink.