a megaohm seal , cell-attached patch clamp technique utilizing plastic suction pipettes for measuring macroscopic rapid inward sodium current ( ina ) was applied to cell membrane patches 30 to 100 micron2 in area at the periphery of reaggregates of myocardial cells from newborn rats cultured for 3 to 7 days .
C0007634
cell
C0007603
cell membrane