NEURON mod files for the Na, K-A, and K-DR currents from the paper: Safronov and Vogel, J.Physiol. 487:91-106 (1995). Running the kinetics_na.hoc or kinetics_k.hoc simulation files will show the activation and inactivation steady-states, the time constants, and a family of curves generated modeling the same protocols used in the paper. Markers show the experimental values estimated from Figs.4C (Na), 8C (KA), and 10C (KDR) of the paper. Note that m is used rather than the more usual m^3 for activation of the Na current. Na recovery from inactivation is not implemented. Under unix systems: to compile the mod files use the command nrnivmodl and run the simulation hoc file with the command nrngui kinetics_na.hoc or nrngui kinetics_k.hoc Under Windows using NEURON 5.1: to compile the mod files use the "mknrndll" command. A double click on the simulation files kinetics_na.hoc or kinetics_k.hoc will open the simulation windows. Questions on the model parameters should be directed to the authors. Questions on how to use this model with NEURON should be directed to michele@pa.ibf.cnr.it