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. 2003 Mar;84(3):1660–1673. doi: 10.1016/S0006-3495(03)74975-3

FIGURE 4.

FIGURE 4

Establishing ion flux assays. (A) Schematic protocol for measurements of paracellular ion fluxes. (B) A Na+ standard curve generated with sodium potentials. (C) A Ca2+ standard curve. (D) A Mg2+ standard curve. (E) A Cl standard curve.