Potassium channel, hh style kinetics, based roughly on sah et al. And hamill et al. (1991), written by z mainen 1995. Not mentioned in paper, unclear origin. These papers feature experimental electrophysiology and imaging, as well as construction of a morphology of a l2/3 pyramidal neuron for modeling. The animal model info here is from the experimental methods, although the experiments may also have been performed in other layers as well.