Rat serum is used as a component of bioassays, immunoassays or enzyme assays. Rat Serum provides a broad spectrum of macromolecules, carrier proteins for lipoid substances and trace elements, attachment and spreading factors, low molecular weight nutrients, and hormones and growth factors that promote cell growth and health. Rat serum is available as a sterile preparation for use as a cell culture supplement.Synonyms: Rat serum for bioassay, control rat serum, non sterile serum from rat.