Fig 1: Quantification of DAB+ cells along the ES reveals staining gradients along the ES epithelium increasing from the iES to the eES. The y-axis shows the percentage of DAB+ cells relative to all ES epithelial cells. For cell counting, both the iES and eES were each divided into ten equal segments. The ticks on the x-axis correspond to each of the ten consecutive segments of the iES (left x-axis) and eES (right x-axis). The first two segments represent the endolymphatic duct epithelium. The values are the percentages of the total number of cells in the respective ES segment and are given as mean values ± SD from six animals. a Quantification of DAB+ cells for CaSR and the apical Ca2+ channels TRPV5 and TRPV6. b Quantification of DAB+ cells for the cytoplasmatic proteins SERCA1 and SERCA2. c Quantification of DAB+ cells for proteins located in the basolateral membrane