FIGURE 1.

PvAMT1;1 is an ammonium transporter that depends on extracellular pH. Inward currents were activated by 1 mm chloride salts of the different monovalent cations in oocytes injected with DEPC/H₂O (A) or the cRNA of PvAMT1;1 (B) at a holding potential of −150 mV. C, summary of the currents recorded from oocytes injected with DEPC/H₂O (white) or cRNA of PvAMT1;1 (gray). Data are the means ± S.D. from more than 10 oocytes from more than three different frogs. D, inward currents activated by 1 mm ammonium at different extracellular pH levels and held at −150 mV from oocytes injected with the cRNA from PvAMT1;1 (top) or DEPC/H₂O (bottom). Data are representative of more than 10 oocytes.