title: Exosporium formation in sporulating cells of Clostridium botulinum 78A.
abstract: In sporulating cells of Clostridium botulinum type A (NCA strain 78A), formation of exosporia was initiated laterally in the sporangia before the synthesis of the spore cortex. Mature spores were enveloped by multilayered exosporia; the layers were uniform in appearance, approximately 3 nm thick, with a center-to-center distance of 7 nm.
mesh_terms: D001431:Bacteriological Techniques; D002462:Cell Membrane; D002473:Cell Wall; D003014:Clostridium botulinum / Q000166:cytology / Q000254:growth & development*; D003593:Cytoplasm; D008854:Microscopy, Electron; D013170:Spores / Q000254:growth & development*; D013171:Spores, Bacterial / Q000166:cytology