Elixirgen Scientific’s Quick-Neuron? Excitatory - Human iPSC-derived Neurons are created using human iPS cells made available through a license from The California Institute for Regenerative Medicine (CIRM). The CIRM iPS cell repository includes over 1,500 iPS cell lines, so please contact us if you would like excitatory neurons derived from a specific donor cell line. Every lot of iPSCs is differentiated into excitatory neurons using our proprietary transcription factor-based technology that is “footprint-free” and delivers functional, high-quality cells.