Figure 1.

Localization of acid-base relevant transporters in the anterior intestine of Atlantic cod Gadus morhua. (A) Transporters including, NBC1 (Na⁺/${\text{HCO}}_3^{-}$ -cotransporter1), NKA (Na⁺/K⁺-ATPase), and CLC3 (chloride channel 3) were localized in deep infoldings of basolateral membranes, whereas NHE3 (Na⁺/H⁺-exchanger 3), pendrin-like SLC26a6 (Cl⁻/${\text{HCO}}_3^{-}$-exchanger), VHA (V-type H⁺-ATPase), and CLC (chloride channel 3) were localized in apical membranes of intestine epithelial cells. Scale bar 20 μm. (B) Western blot analyses using homogenates from anterior intestine tissues demonstrate the specificity of each antibody.