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. 2012 Apr 18;287(25):21121–21129. doi: 10.1074/jbc.M112.341016

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© 2012 by The American Society for Biochemistry and Molecular Biology, Inc.

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FIGURE 6. — Electron density map. A, the two antiparallel strands are colored cyan and pink. B–E, each strand consists of two parallel protofilaments individually presented in different colors. The cyan strand in A is the red and purple protofilaments. The pink strand in A is the cyan and green protofilaments. B, strand 1 face; C, strand 2 face; D, trench face; E, back face. A comparison of B with C highlights the antiparallel nature of the two strands in the Alp12 filament. F, fitting of the model into the electron density map. The three-dimensional reconstruction was obtained from 91 filaments and 5582 particles, and the resolution was 19.7 Å. See supplemental Fig. S12 for an enlarged view.