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. Author manuscript; available in PMC: 2014 Jun 10.
Published in final edited form as: Methods Mol Biol. 2014;1071:29–47. doi: 10.1007/978-1-62703-622-1_3

Fig. 3.

Fig. 3

A sensor’s Kd’ is calculated by fitting experimental data to a single-site or two-site binding model. An example of each binding curve is shown next to the equation relating the [ion] to the fraction bound (Y), which is calculated from the FRET ratio (R), Rfree, and Rbound. When the single-site binding model is used, the [ion] is readily calculated using the displayed equation.