CF-1 MEF Feeder Cells, P3, irradiated, are derived from CF-1 mouse embryos and used as feeder layers to support the growth of undifferentiated mouse or human embryonic stem cells (ESC) and induced pluripotent stem cells (iPSC). We offer multiple quantities, for a smaller size, see: CF-1 MEF Feeder Cells, P3, irradiated.