Figure 1.

Urine concentrating ability in 52-week-old UT-B-null and wild-type mice. A: Twenty-four hour urine output (mean ± SE, 5 mice/group). B: Urine osmolality measured in mice given free access to food and water (basal) and after water deprivation for 18 h. *p < 0.01 versus wild-type mice.