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Structure of CrgA transmembrane domain determined in lipid bilayers. (A) TM1 (cyan) and TM2 (pink) both have a tilt angle of 13°, and cross each other at a 24° angle near Gly39 and Leu42 of TM1 and Phe81 and Thr84 of TM2. (B) A rotated view showing the four interhelical distance restraints (dashed red lines) determined from the MAS spectra.
