Protein A (ProA, Staphylococcus A Protein) (Biotin)

Molecular Biology / MB-BioSep Protein A/G/L

-20°C

Supplied as a lyophilized powder in PBS, 0.02M potassium phosphate, 0.15M sodium chloride, pH 7.2, 0.01% sodium azide, 10mg/ml BSA. Reconstitute with sterile dH2O or PBS. Labeled with Biotin.

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.