Table 4. Saturation of E309K by vesamicol^a.

pH	$K_{\mathrm{v}}^{\mathrm{pH}}$ (nM)b
7.4	120 ± 20
8.5	35 ± 4
9.3	9.2 ± 1.1
10.2	1.4 ± 0.2

^aEq. 2 and 3 were fitted simultaneously to data shown in Fig. 6. The B_max value was 24 ± 1 pmol/mg. A value in boldface is significantly different from that of wild-type at the same pH.

^bFor protonated vesamicol. Superscript pH in $K_{\mathrm{v}}^{\mathrm{pH}}$ is an identifier and not an exponent.