Purified by ion exchange chromatography. IEP Assay shows a single precipitin arc against source serum protein and IgG. Label: Biotinamidocaproate N-Hydroxysuccinimide Ester (BAC) Biotin/Protein Ratio: 10-20 BAC molecules per Guinea Pig IgG molecule Applications: Suitable for use in ELISA, Western Blot and Immunohistochemistry. Other applications have not been tested.