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Catalog Number:

bs-0362P

Species:

S.aureus

Host:

E.coli

AA Seq:

37-469/516

Predicted MW:

34

Detected MW:

45-47 kDa

Tags:

Tag free

Activity:

Yes

Endotoxin:

Not analyzed

Purity:

>95% as determined by SDS-PAGE

Purification:

AC

Concentration:

＞0.5 mg/ml

Storage:

Stored at -70℃ or -20℃. Avoid repeated freeze/thaw cycles.

Background:

Protein A is a surface protein of S.aureus which binds IgG molecules by their Fc region. In serum, the bacteria will bind IgG molecules in the wrong orientation on their surface which hinders opsonization and phagocytosis. Mutants of S. aureus lacking protein A are more efficiently phagocytosed in vitro, and mutants in infection models have diminished virulence. Due to its affinity for the Fc region of many mammalian immunoglobulins, protein A is considered a universal reagent in biochemistry and immunology.