%0 Journal Article %J American Journal of Physiology-Renal Physiology %D 2012 %T Urine concentrating mechanism: impact of vascular and tubular architecture and a proposed descending limb urea-Na+ cotransporter %A Layton, Anita T %A Dantzler, William H %A Pannabecker, Thomas L %B American Journal of Physiology-Renal Physiology %I American Physiological Society Bethesda, MD %V 302 %P F591–F605 %G eng