Table 3.

Reversal potentials of I_shrink in various hypertonic solutions

Solution (mm)	Erev (mV)
120 KCl	−11.6 ± 1.9
30 KCl	−13.1 ± 1.9
120 NaCl	−9.5 ± 3.4
120 CsCl	−14.3 ± 5.1
115 TEA-Cl	−22.3 ± 2.3
120 TBA-Cl	−19.9 ± 2.9
100 caesium acetate	−13.3 ± 4.5
120 sodium glutamate	−2.4 ± 2.4

Values are means ± s.d. The osmolarity of each solution was adjusted to 500 mosmol l⁻¹ by adding mannitol. CaCl₂ (2 mm) was added to KCl, NaCl, CsCl, TEA-Cl and TBA-Cl solutions. Calcium acetate (2 mm) was added to caesium acetate solutions. Hepes-KOH (5 mm) was added to KCl solutions. Free Hepes was added to other solutions. pH for all solutions was 7.2.