Creative Bioarray's normal Human Epidermal Keratinocytes adult (HEKa), when grown in Creative Bioarray's LIDer K Medium, provides an ideal serum-free culture model, for the study of wound healing, toxicology or epithelial biology. Creative Bioarray's HEK are cryopreserved as primary cells to ensure the highest viability and plating efficiency. Our HEK are quality tested in LIDer K Medium to ensure optimal serum-free growth over a period of at least 15 population doublings at rates equal to or greater than serum-supplemented medium. Product Link: http://www.creative-bioarray.com/Human-Epidermal-Keratinocytes-adult-CSC-C4120X-item-2088.htm