Figure 3.
Efflux of 14C-urea under SE conditions at pH 7. 2, 25°C, and 1 mM in RBC with a 47-yr interval from the same donor. P u was 2.8 (SD ± 0.2, n = 6) × 10−4 cm/s in 1973 and 0.5 (SD ± 0.2, n = 6) × 10−4 cm/s in 2020.
Efflux of 14C-urea under SE conditions at pH 7. 2, 25°C, and 1 mM in RBC with a 47-yr interval from the same donor. P u was 2.8 (SD ± 0.2, n = 6) × 10−4 cm/s in 1973 and 0.5 (SD ± 0.2, n = 6) × 10−4 cm/s in 2020.