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. 2003 Jun;84(6):3594–3606. doi: 10.1016/S0006-3495(03)75091-7

TABLE 1.

Number of ions in L-type calcium channel with either 150 mM CaCl2 or 150 mM NaCl, estimated from PNP, modified PNP, and BD

Number of ions in channel, 150 mM CaCl2
Number of ions in channel, 150 mM NaCl
Ca2+ Cl− Na+ Cl−
PNP 1.98 0.48 3.31 0.22
MPNP 1.12 0.01 2.61 0.01
BD 1.91 0.08 3.03 0.07