This model is similar to the E_max model, however it can be applied when the conc-effect relationship does not follow the typical simple hyperbolic function.

" n " is the parameter that affects the shape of the curve. When n>1, this means that the interaction of the first molecule with the site of action makes the site of action more sensitive to the interaction with the following molecule.

When n<1, this means that the interaction of the first molecule with the site of action makes the site of action less sensitive to the interaction with the following molecule.