Protein A is a surface protein (approximately 56kD in size) originally discovered within the cell wall of Staphylococcus aureus. While important for bacterial survival, Protein A has beneficial uses in immunology for its high affinity binding to immunoglobulins (especially the IgG isotype). This high affinity property makes Protein A essential in the large scale purification.||Source:|This product was prepared from chromatographically pure Protein A. Assay by immunoelectrophoresis resulted in a single precipitin arc against anti-biotin and anti-Protein A.||Applications:|Suitable for use in ELISA, Western Blot and Immunohistochemistry. Other applications not tested.||Recommended Dilution:|ELISA: 1:20,000-1:200,000|Western Blot: 1:10,000-1:40,000|Immunohistochemistry: 1:1000-1:5000|Optimal dilutions to be determined by the researcher.||Storage and Stability:|Lyophilized powder may be stored at -20°C. Stable for 12 months at -20°C. Reconstitute with sterile buffer or dH2O. Aliquot to avoid repeated freezing and thawing. Store at -20°C. For maximum recovery of product, centrifuge the original vial after thawing and prior to removing the cap. Further dilutions can be made in assay buffer.

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