Learn how to use this product HybridomaPlus is a protein- and serum-free ready-to-use medium that supports the growth of hybridoma and myeloma cells for monoclonal antibody production. It contains no polypeptide growth and attachment factors or mediators that may complicate downstream processing and final product purification. HybridomaPlus may also be used as a growth medium. It can also be utilized as a serum-supplemented medium.