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. 1997 Feb 1;109(2):141–146. doi: 10.1085/jgp.109.2.141

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Superimposed responses to bright flashes in Ringer solution and on exposure to 0 Ca²⁺/0 Na⁺ solution, (A) from 1 s before until 1 s after the flash, (B) from the time of the flash until 1 s after the flash, (C) from 1 s before the flash until the time of the flash, and (D) from 1 s after until 2 s after the flash. Each trace is the average of four responses; measurements in Ringer and 0 Ca²⁺/0 Na⁺ solution were bracketed symmetrically in time. Bright flash delivered 5,560 photons μm⁻².