Learn how to use this product HEK|ONE S is a serum-free, chemically-defined, animal component-free feeding supplement for stable and transient Embryonic Kidney 293 (HEK293) cells and other human cell lines. HEK|ONE S comes without L-Glutamine and is supplemented with Growth Hormones. HEK|ONE S supports cell growth and production of recombinant proteins and antibodies in suspension culture. It is suitable for research and further manufacturing.