Horse serum and other equine sera are animal-derived serum preparations used in laboratory research. Depending on the preparation, applications may include cell culture, immunoassays, blocking, and assay controls.
Horse serum is often used in testing media for mycoplasma contamination or as a blocking agent and controls in immunoassays. It can also be combined with fetal bovine serum for the culture of rat adrenal pheochromocytoma (PC12) cells.