Fig. 7.
Calcium oscillation. Time-lapse quantitization of intracellular Ca2+ concentration in macrophages treated with a partially purified venom fraction (fraction II) and purified pure toxin (Ts1). Vehicle control (phosphate-buffered saline): filled diamonds; FII: empty squares; purified Ts1: filled triangles. Note that the addition of vehicle lowers the intensity of the control at time 0 but it then becomes considerably stable, compared with the intracellular Ca2+ fluctuations observed in the toxin-treated cells.