HRPTEpiC from Creative Bioarray Research Laboratories are isolated from human kidney. HRPTEpiC are cryopreserved at passage one and delivered frozen. Each vial contains >5 x 10^5 cells in 1 ml volume. HRPTEpiC are characterized by immunofluorescent method with antibodies to cytokeratin-18, -19 and vimentin. HRPTEpiC are negative for HIV-1, HBV, HCV, mycoplasma, bacteria, yeast and fungi. HRPTEpiC are guaranteed to further expand for 15 population doublings in the condition provided by Bioarray.