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Model of the cell–cell communication structure in filamentous cyanobacteria. (A) Schematic filament of vegetative Anabaena cells with two sectioned cells (cell 1 and cell 2), allowing the view on top of the septal disks. (B) Model of the septal disks between vegetative cells, showing AmiC drilling a nanopore, thereby forming the nanopore array. Nanopores containing septal junction complexes allow the exchange of molecules through the septal peptidoglycan.
