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. 2020 Apr 8;318(6):C1107–C1122. doi: 10.1152/ajpcell.00061.2020

Fig. 4.

Fig. 4.

Effect of moderate and strong knockdown of Tsp2A on the ultrastructure of the main secretory segment of the adult Malpighian tubule of female Drosophila melanogaster. Transmission electron microscopy of the driver control (A: w;+/+;c42-GAL4/+); moderate Tsp2A knockdown (B; w;+/+;c42-GAL4/VDRC_101081); and strong Tsp2A knockdown (C; w;+/+;c42-GAL4/11415R2). AJ, adherens junction; bal, basal lamina; bm, basement membrane; lc, luminal compartment; m, mitochondria; mv, microvilli; pm, peritubular medium; sSJ, smooth septate junction; tr, trachea. Open arrows point to gaps in septate junctions; open arrowheads point to apposed cell membranes. Note the location of the AJ on the apical side of the sSJ (Ad).