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

Figure 20.

Figure 20

Release computations incorporating the effects of SR depletion and global cytosolic calcium. (A) Global cytosolic [Ca2+] during depolarizations to two voltages. (B) Ca2+ release current, showing at the higher voltage a slow decaying phase, due to SR depletion during the pulse. (C) SR calcium content during the two pulses, expressed as equivalent concentration in accessible myoplasmic water. (D) Release corrected for depletion; i.e., divided by the fraction of SR calcium content remaining. The qualitative features of the corrected release are similar to the results of the model when the global calcium pool is neglected (e.g., Fig. 1).