1.2.1.80	K+	K+, NH4+, and Rb+ at 0.2 M activate up to 20fold. Inhibitory at higher concentrations	39	
1.2.1.80	NH4+	K+, NH4+, and Rb+ at 0.2 M activate up to 20fold. Inhibitory at higher concentrations	54	
1.2.1.80	Rb+	K+, NH4+, and Rb+ at 0.2 M activate up to 20fold. Inhibitory at higher concentrations	480