Figure 5. Change of diameter of Xenopus oocytes expressing AQP0 Xenopus oocytes expressing AQP0 were immersed in hypotonic solution (30% ND96 soluion). The diameter of Xenopus oocytes injected with 25 ng of AQP0 cRNA (closed square) or water (closed circle) was measured. The oocytes expressing AQP0 permeated more water than control.