Transcript expression of creatine transporters MCT12 and CRT1 along the mouse nephron. Indicated segments were microdissected, total RNA isolated and reverse transcribed. Expression of indicated transcripts was quantified by Taqman-based RT-PCR and normalized to GAPDH transcript levels. Upper panel: segment-specific transcripts and purity of preparation. Lower panel: expression of MCT12 and CRT1 transcripts. n=6 mice; data are means±SD. AQP2, aquaporin-2; CCD, cortical collecting duct; CNT, connecting tubule; DCT, distal convoluted tubule; NaPi-2a, sodium/phosphate cotransporter isoform 2a; NCC, Na- and Cl-cotransporter; PCT, proximal convoluted tubule; PST, proximal straight tubule; TALH, thick ascending limb of loop of Henle; UMOD, uromodulin.