
Fig. 4. Immunolabelling of the V1 complex in midgut goblet cells from
Manduca sexta. Cryosections from feeding (A; fifth-instar, days 2-3),
starving (B; fifth-instar, day 2-3), moulting (C; fourth- to fifth-instar,
moulting stage D) and 20-hydroxyecdysone-treated (D; fifth-instar, days 2-3,
24h after hormone injection) larvae were stained with monoclonal antibody
221-9 to V-ATPase subunit A (Klein et al.,
1991). Scale bar, 30µm; a, apical; b, basal; g, goblet cell
cavity; asterisks indicate goblet cell apical membranes; arrows point to
goblet cell nuclei.