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Figure 5


Fig. 5. Representative gill sections probed with the {alpha}1a isoform AP-labelled cDNA probe. The insert in panel A shows orientation of sections: X-plane – frontal section; Y-plane – sagittal section. (A–C) Gills from FW salmon; (D,E) gills from SW salmon. A,B,D are sagittal sections, showing lamellae emerging perpendicularly from the filament. C,D are frontal sections at the base of the lamellae, showing cells in the interlamellar region. Solid arrows show labelled cells on lamellae, open arrows show labelled cells in filament. Gill sections were 10 µm thick. Bars indicate 100 µm. AP, alkaline phosphatase; FW, freshwater; SW, seawater.