Fetal Bovine Serum (FBS), Embryonic Stem Cell Pre-tested or ES Cell FBS is a specially-tested fetal bovine serum that ensures maintenance of pluripotency and reduced differentiation of embryonic stem cells in culture. Embryonic stem (ES) cells are particularly demanding, and it is crucial to keep them in their valuable, undifferentiated state. Historically, ES cell researchers had to laboriously screen several lots of serum to find one suitable for their cells. Capricorn Scientific offers ES Cell Pre-tested FBS to minimize the need for prescreening serum, saving both time and money while providing the assurance that the serum used has been screened by experienced ES cell culturists. The screening includes growth promotion, colony morphology, and cytotoxicity. ES Cell Pre-tested FBS is selected from our highest-quality FBS lots and pre-tested on murine embryonic stem cells. Fetal bovine serum (FBS) or fetal calf serum (FCS) is widely used in eukaryotic cell culture, typically as a supplement for growth media. Fetal bovine serum contains nutritional and embryonic growth promoting factors that are essential for a successful cell culture. Further, fetal bovine serum contains various small molecules, such as, e.g., amino acids, lipids, sugars, and hormones. Fetal bovine serum (FBS) is the blood component obtained after coagulation and removal of cellular components. Its unique and comprehensive mix makes FBS one of the most important supplements for supporting cell growth and proliferation for in vitro cell culture. Our fetal bovine serum for cell culture supports most cell lines and undergoes strict quality controls. This product is collected in South America.