Fig 4. Renal function.
Urine concentrating capacity was assessed in male and female wildtype (Ren-b+/+), heterozygous Ren-b knockout (Ren-b+/-) and homozygous Ren-b knockout mice (Ren-b-/-). Urine was first collected for 60 minutes post-hypotonic saline challenge (500 microliters of 0.03 mol/L NaCl; intraperitoneal). Subsequently, the same procedure was performed for a hypertonic saline challenge (500 microliters of 0.3 mol/L NaCl; intraperitoneal). *p<0.05 vs same genetic group on hypotonic challenge.