Thymic Epithelial Cell Growth Supplement (TyEpiCGS) is a medium supplement designed for the optimal growth of normal thymic epithelial cells in vitro. It is a sterile, concentrated (100X) solution which contains growth factors, hormones, and proteins necessary for the culture of normal human thymic epithelial cells. The supplement is formulated (quantitatively and qualitatively) to provide a defined and optimally balanced growth environment that maximally promotes the growth of normal human thymic epithelial cells in vitro. The supplement is designed as an additive for Thymic Epithelial Cell Medium (TyEpiCM, Cat. #3911) and should be used in conjunction with this medium. Note: Due to bovine pituitary extract (BPE) in the growth supplement, the color may vary with different lots and formation of lipoproteins can result in precipitates. This does not affect the biological activity. This product is for research use only. It is not approved for human or animal use, or for application in in vitro diagnostic procedures.