Si influx in oocytes expressing AQP1, expressing AQP10, or injected with water. (A) Oocytes incubated in medium B2 for 90 min at room temperature were assayed for Si content. Data are expressed as means ± SE of 10 oocytes among 25–26 experiments, using the asterisk to indicate that they are significantly different statistically (*, P < 0.05) compared with oocytes injected with water. (B) Water permeability in oocytes expressing AQP1, expressing AQP10, or injected with water. Oocytes incubated in plain water were assayed for volume measurements as described in Materials and methods. Data are expressed as mean Pf ± SE of three to five oocytes among five to six experiments, using the asterisk to indicate that they are significantly different statistically (*, P < 0.05) compared with oocytes injected with water.