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. 1997 Oct 1;110(4):415–440. doi: 10.1085/jgp.110.4.415

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Time dependence of Ca²⁺ microdomain concentration after opening of a release channel, as seen at the locations of nearby release channels. A reference source current of 1 pA is assumed; actual [Ca²⁺] scales in proportion to the source unitary current.