in a23187-activated cells , f-actin content increases at [ ca2+ ] free greater than or equal to 5 microm , is maximal at [ ca2+ ] free greater than or equal to 10 microm and is negligible at physiologic free [ ca2+ ] ( 10 ( -7 ) -10 ( -6 ) m ) .
C0007634
cells
C1180307
f-actin