FIGURE 6.
pH dependence and CCCP sensitivities of CgHXT activities. A, transport rates for 14C-labeled glucose were determined at the indicated pH-values in 50 mm sodium phosphate buffer at initial glucose concentrations of 1 mm for CgHXT1, CgHXT2, CgHXT5 or 0.1 mm for CgHXT3 (n = 3; ± S.E.). B, sensitivities to the uncoupler CCCP were studied at pH 5.0 in the absence or presence of 50 μm CCCP (n = 3; ± S.E.).