HCF-fa from Creative Bioarray are isolated from the human fetal atrium. HCF-fa are cryopreserved at secondary culture and delivered frozen. Each vial contains >5 x 105 cells in 1 ml volume. HCF-fa are characterized by immunofluorescence with antibody specific to fibronectin. HCF-fa are negative for HIV-1, HBV, HCV, mycoplasma, bacteria, yeast and fungi. HCF-fa are guaranteed to further expand for 15 population doublings under the conditions provided by Bioarray Research Laboratories.