ClonaCell™-HY AOF Expansion Medium is an animal origin-free (AOF) and serum-free liquid medium optimized for hybridoma expansion after hypoxanthine, aminopterin, thymidine (HAT) selection. The medium contains hypoxanthine and thymidine (HT) and is used to wean hybridomas off aminopterin used during the selection process. ClonaCell™-HY AOF Expansion Medium promotes robust expansion of hybridomas, adaptation from serum-containing to serum-free media, and stabilizing the viability and antibody productivity of hybridoma cell lines. The majority of hybridomas can be switched directly from serum-containing media to ClonaCell™-HY AOF Expansion Medium without an adaptation step. The absence of serum in this medium facilitates detection and purification of the desired hybridoma-derived antibody without interference from serum-derived immunoglobulins.

This medium has been verified for use with mouse and rat hybridomas and is suitable for expansion of mouse myelomas such as Sp2/0, rat myelomas such as YB2/0, and human myelomas such as U266. In most cases, cryopreserved hybridomas can be thawed directly into ClonaCell™-HY AOF Expansion Medium while maintaining a high level of viability. This medium may be used as a serum-free alternative to ClonaCell™-HY Medium A (Catalog #03801) or ClonaCell™-HY Medium E (Catalog #03805). No materials of animal or human origin are used in the manufacture of this medium or its components, to at least the secondary level of manufacturing.