Summary
AChironomus salivary gland consists of a chain of 30 giant cells (G-cells) and 4 to 6 flat cells (F-cells) spanning a lumen. The surface membranes of these cells are linked by two kinds of organized structures: theseptate junction, taking up nearly the entire surface of cell contact, and thegap junction, occupying a small fraction of this surface. (These junctional structures are examined in the electron microscope after La infiltration.) All cells are joined to their immediate neighbors by septate junctions, the G- to G-cells, the F- to F-cells, and the F- to G-cells; the G-cells, at least, are also joined by gap junctions. All cells are also in communication with each other: small inorganic ions, fluorescein (mol. wt. 330) and Procion Yellow (mol. wt. ∼550) pass from one cell interior to the next.
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Rose, B. Intercellular communication and some structural aspects of membrane junctions in a simple cell system. J. Membrain Biol. 5, 1–19 (1971). https://doi.org/10.1007/BF01870823
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DOI: https://doi.org/10.1007/BF01870823