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Electron micrographs depicting the coat assembly in sporulating Clostridium botulinum cells. (A) ATCC 3502, (B) ATCC 19397, (C) UN1/10-7B, (D) ATCC 17841, (E) UN5/11-8, (F) Eklund 17B, (G) Beluga, (H) CB11/1-1, (I) Stockholm C, (J) BKT015925. Coat fragments are indicated with black arrows.
