7.2.2.19 6.3 8 remarkable reduction in acidification of anterior prostate fluids from 6.38 for wild-type to 6.96 for homozygous mutants 671221 7.2.2.19 6.5 - assay at 689063 7.2.2.19 6.6 7.4 the optimal pH for the ouabain-sensitive ATPase activity in the presence of K+ is pH 7.4, while the optimum pH for this activity, in the absence of K+, is pH 6.6 711012 7.2.2.19 6.8 - - 246851 7.2.2.19 6.8 - assay at 685080, 687724 7.2.2.19 6.8 - H+,K+-ATPase activity assay 686551 7.2.2.19 7 - assay at 685328, 688697, 700594, 712894 7.2.2.19 7.2 - assay at 711245 7.2.2.19 7.2 7.3 assay at 713552 7.2.2.19 7.4 - - 246853 7.2.2.19 7.4 - assay at 685234, 685549, 685586, 688059, 698979, 699742 7.2.2.19 7.5 - assay at 697414