Modeling software for electrophysiology?

[pathology at mscf.med.upenn.edu]

Can anyone recommend a program for fitting ion current versus voltage data
across membranes to Eyring multi-site and multi-barrier models of current
flow?  Such data, for example, are generated from electrophysiology experiments
with channel proteins in membranes. 

Thanks for any help.  I will post a summary of responses to this question.

Gregg Wells
Department of Pathology
University of Pennsylvania
Philadelphia, Pennsylvania
USA
e-mail:  pathology at a1.mscf.upenn.edu