Reconstitution of action potentials in a model of a hippocampal mossy fiber from action potential-evoked sodium, potassium and calcium current waveforms as described in Henrik Alle, Arnd Roth and J. R. P. Geiger, Energy-efficient action potentials in hippocampal mossy fibers, Science 325, 1405-1408 (2009). doi: 10.1126/science.1174331 This directory contains mod and hoc files for the NEURON simulator, as well as dat files representing the conductance waveforms which are read in via the stepforce() function in GNa.mod, GK.mod and GCa.mod. To run the simulations, follow these steps: 1. compile the mod files using nrnivmodl under Mac OS X and Linux, or mknrndll under Windows 2. run reconstitution.hoc in NEURON. This performs the simulation shown in Fig. 2A and B of the paper and plots the results using NEURON's graphical user interface. 3. if desired you can perform an automated fit of the measured action potential waveform by running fit_th1.hoc. This writes results to three files: parameters1.txt, measuredAP1.txt, and modelAP1.txt and may take several hours. If you have questions please contact henrik.alle@charite.de arnd.roth@ucl.ac.uk