SLC14A2 and pyelonephritis: In contrast, urea transporter (UT‐A; SLC14A2) and B1‐V‐ATPase (ATP6V1B) expression were not significantly changed by severe pyelonephritis UT‐A: NH4Cl‐A = 1.1 ± 0.5; p = 0.52; B1 (ATP6V1B): NH4Cl‐A = 0.85 ± 0.08; p = 0.12 versus N vs. Navg or 1.0 ± 0.2, N = 5/group).