Abstract
Thin section and freeze-fracture electron microscopy revealed that the terminal bars of the larval midgut epithelium ofAeshna cyanea consisted of extended smooth septate junctions (SSJ), multiple adhesive junctions and rare gap junctions. Freeze-fractures of native tissue suggested that the septal building units were anchored only in the external membrane leaflet by partially integrated proteins while the interseptal pegs were anchored partly in both leaflets by completely integrated proteins and partly by presumed peripheral proteins.
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