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Fig. 2. Projection maps of the mouse urothelial plaque. (A) A map calculated from six untilted crystals, including all data of up to 7 Å resolution. (B) Another projection map calculated using data of up to 12 Å resolution. For comparison, the outlines of the 16 nm particles according to the 3D reconstruction (shown in Fig. 4A) are marked by unbroken white lines; the symmetry elements of twofold (ovals), threefold (triangles) and sixfold (central hexagon) axes are indicated.