Expression of selected renal marker genes in the adult mouse kidney. In situ hybridizations were performed on paraffin sections of adult kidneys taken from 12-week old mice. Whole transverse sections (upper panels) and magnifications (lower panels) are shown to illustrate marker gene expression in detail. (a) Slc5a2: proximal tubules (S1, S2). (b) Slc7a13: proximal tubules (S2, S3). (c) Slc8a1: connecting tubule. (d) Slc12a1: thick ascending limb. (e) Slc12a3: distal convoluted tubule. (f) Slc16a7: thick ascending limb, connecting tubule. (g) Cldn8: descending thin limb, connecting tubule, collecting duct. (h) Calb1: distal convoluted tubule, connecting tubule.