FCS Express Version 5可将用户数据用不同的方程进行拟合。
下表中列出了这些方程(它们包括多种公式)及FCS Express在进行数据拟合时定义的参数。
方程名称  | 
FCS Express Function Name(函数名称)  | 
Equation(方程)  | 
Variables(变量)  | 
Michaelis Menten(米氏方程)  | 
MichMenten  | 
 
  | 
Vmax, Km  | 
TwoSiteBinding(双位结合)  | 
TwoSiteBinding(双位结合)  | 
  | 
Vmax, KM, Vmax2, KM2  | 
Four Parameter Logistic(四参数逻辑) (4PL)  | 
FourParmLogistic  | 
  | 
Imax, Imin, IC50, Hill  | 
Five Parameter Logistic(五参数逻辑) (5PL)  | 
FiveParmLogistic  | 
  | 
Imax, Imin, IC50, Hill, Asym  | 
Boltzmann(玻尔兹曼函数)  | 
Boltzmann(玻尔兹曼函数)  | 
  | 
Bottom, Top, V50, Slope  | 
Exponential(幂指数)  | 
Exponential(幂指数)  | 
  | 
A, M, C  | 
Two Phase Exponential(双相幂指数)  | 
TwoPhaseExponential  | 
  | 
A, M, A2, M2, C  | 
Exponential Association(幂指数关联)  | 
ExpAssociation  | 
  | 
Ymax1, K1  | 
Two Phase Exponential Association(双相幂指数关联)  | 
TwoPhaseExpAssociation  | 
  | 
Ymax1, K1, Ymax2, K2  | 
Exponential Grow(指数增长)  | 
ExponentialGrow  | 
  | 
A, M, C  | 
Power(幂函数)  | 
Power(幂函数)  | 
  | 
A1, B1, K  | 
Power Series(幂级数)  | 
PowerSeries  | 
  | 
A1, B1, A2, B2, K  | 
Linear(线性函数)  | 
Linear(线性函数)  | 
  | 
m, b  | 
Parabolic  | 
Parabolic  | 
  | 
m, b, A2  | 
Cubic(立方函数)  | 
Cubic(立方函数)  | 
  | 
m, B, A2, A3  | 
Sine Wave(正弦曲线)  | 
SineWave  | 
  | 
Baseline(基线), Amplitude(振幅), Frequency(频率), Offset(偏移)  | 
Gaussian(高斯函数)  | 
Gaussian(高斯函数)  | 
  | 
A, SD, xMed, K  | 
Sigmoidal  | 
Sigmoidal  | 
  | 
A, B, C  | 
Decreasing Sigmoidal(递减反曲线)  | 
SigmoidalDec  | 
  | 
A, B, C  |