Figure 5.

Effect of K⁺, Cs⁺, and Ca²⁺ on Na⁺ contents and Na⁺ sensitivity of LCT1-transformed cells. a, Na⁺ contents of LCT1-transformed G19 cells 7 h after addition of 50 mm NaCl alone (control) or together with 50 mm KCl, CsCl or CaCl₂. Values are standardized with respect to Na⁺ contents in 50 mm NaCl with no other cations added. Means of three experiments ± se are shown. b, Addition of 10 mm KCl, CsCl, or CaCl₂ restores growth of LCT1-transformed cells on agar plates containing AP medium with 20 or 50 mm NaCl added.