we have investigated the atp-induced permeabilization of rat peritoneal mast cells using three different techniques : ( a ) by measuring uptake of fluorescent membrane and dna marker dyes , ( b ) by voltage-clamp measurements using the patch-clamp technique , and ( c ) by measurements of exocytosis in response to entry of ca2+ and gtp gamma s into permeabilized cells .
C0015283
exocytosis
C0007634
cells