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Available Equations

Contents

FCS Express has the ability to fit your data to many different types of equations.

Below you will find a table indicating the equation, the formula associated with it, and the parameters defined in FCS Express when a fit is performed.

Equation Name	FCS Express Function Name	Equation	Variables
Michaelis Menten	MichMenten		Vmax, Km
TwoSiteBinding	TwoSiteBinding		Vmax, KM, Vmax2, KM2
Four Parameter Logistic (4PL)	FourParmLogistic		Imax, Imin, IC50, HillSlope
Five Parameter Logistic (5PL)	FiveParmLogistic		Imax, Imin, IC50, HillSlope, Asym
Four Parameter Log Logistic	FourParmLogLogistic		Imax, Imin, Midpoint, HillSlope
Five Parameter Log Logistic	FiveParmLogLogistic		Imax, Imin, Midpoint, HillSlope, Asymmetry
Boltzmann	Boltzmann		Bottom, Top, V50, Slope
Exponential	Exponential		A, M, C
Two Phase Exponential	TwoPhaseExponential		A, M, A2, M2, C
Exponential Association	ExpAssociation		Ymax1, K1
Two Phase Exponential Association	TwoPhaseExpAssociation		Ymax1, K1, Ymax2, K2
Exponential Grow	ExponentialGrow		A, M, C
Power	Power		A1, B1, K
Power Series	PowerSeries		A1, B1, A2, B2, K
Linear	Linear		m, b
Parabolic	Parabolic		m, b, A2
Cubic	Cubic		m, B, A2, A3
Sine Wave	SineWave		Baseline, Amplitude, Frequency, Offset
Gaussian	Gaussian		A, SD, xMed, K
Sigmoidal	Sigmoidal		A, B, C
Decreasing Sigmoidal	SigmoidalDec		A, B, C