Fig. 4. Inhibition of sperm-triggered [Ca²⁺] oscillations by mitochondrial inhibitors. Variations of [Ca²⁺]_i observed at fertilisation (measured with fura red AM in A and B or with fura 2 AM in C). 1 µM FCCP (A), 2 mM CN^– (B) or 60 µM oligomycin (C) are added to the chamber as indicated by the bar under the graph.