-a are isolated from adult human skin. HDF-a are cryopreserved at primary culture and delivered frozen. Each vial contains >5 x 10^5 cells in 1 ml volume. HDF-a are characterized by their spindle morphology and immunofluorescent method with antibody to fibronectin. HDF-a are negative for HIV-1, HBV, HCV, mycoplasma, bacteria, yeast and fungi. HDF-a are guaranteed to further expand for 15 population doublings at the condition provided by Creative Bioarray.