Description：Recombinant Protein A is produced by E.coli expression system and the target gene encoding Ala37-Lys327 is expressed with a 6His tag at the C-terminus.Form：Liquid in a 0.2 μm filtered solution of PBS, pH 7.4.Gene Symbol：spaAlternative Names：Immunoglobulin G-binding protein A; IgG-binding protein A; Staphylococcal protein A; SpA SwissProt (Human)： P38507; Purity：Greater than 95% as determined by reducing SDS-PAGE.Directions for Use：Please minimize freeze-thaw cycles.Quality Control：Endotoxin: Less than 0.1 ng/µg (1 IEU/µg) as determined by LAL test.Storage/Stability：Store it at -20°C to -80°C for one year. It is recommended that the protein be aliquoted for optimal storage. Avoid repeated freeze-thaw cycles.