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Representative agarose mini-gel showing the amplification DNA products obtained by PCR using the same RT reaction from microdissected rat TALs for all genes 1: AQP1; 2: Na-K-2Cl cotransporter (NKCC2; a specific marker for the TAL); 3: smooth muscle α actin (smα-actin; a specific marker for the vasa recta); 4: amplification product for smα-actin using RNA from vascular smooth muscle cells (VSMC) as a positive control (n = 5).
