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. 1998 Nov 1;112(5):569–576. doi: 10.1085/jgp.112.5.569

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Response to a calcium ramp generated by perfusion. (A) The dynamic response to calcium ramps of identical magnitude but different rates of delivery. (B) The difference in pCa at 50% fusion in the dynamic response to the two ramps is not significant. The slope of the cross-correlation between the fusion response at the two different calcium-delivery rates using normalized time as the parametric variable is consistent with no significant differences between the dynamic response for 11- and 23-min ramps.