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(A) The application of suction to the pipette of cell-attached patches of larval skin epithelial cells stimulated cation channel activity that rapidly adapted after initial activation. Bath and pipette solutions were normal Ringer's solutions with 1 mmol l−1 Ca2+. (B) The presence of amiloride (100 μmol l−1) or (C) ATP (10 μmol l−1) in the pipette solution did not produce channel activity or affect activation by pipette suction.
