Recombinant Staphylococcal Protein A, r-SPA

Recombinant Staphylococcal Protein A, r-SPA
General description
Protein A is a cell-wall protein derived from Staphylococcus aureus which has unique binding properties to a variety of mammalian species of IgG. It can also bind some IgM and IgA. Protein A binds the Fc region of immunoglobulins through interaction with the heavy chain. It can be coupled to a variety of reporter molecules, such as fluorescent dyes, enzyme markers, biotin, colloidal gold, and radioactive iodine without affecting the antibody binding site. The recombinant version of protein A was developed to increase the specificity for IgG.
CAS NO.: 91932-65-9
Source: Escherichia coli.(No animal components are used in the manufacturing process of this product, animal-free material.)
Form: Lyophilized
Mol. Weight: 30 kDa 
Appearance: White powder
Formulation: buffer system is 5mM PB, PH7.4 before lyophilization
Purity:  ≥95% (SDS-PAGE)
Isoelectric Point: 5.10
Synonyms:Immunoglobulin G-binding protein A, IgG-binding protein A, Staphylococcal protein A, SPA.
Package: 1mg,10mg,100mg,500mg
Storage&Shift life: -20ºC 3years 
Application: Immunoprecipitation, antibodies purification, and assay development.
Limitations: For LABORATORY RESEARCH USE ONLY and is not approved for use in humans or clinical.