Staphylococcus aureus Recombinant Hla (tag free), also known as alpha toxin (?-toxin). Expressed in E. coli as a recombinant protein without TAG. ?-toxin is purified by column chromatography. Theoretical molecular weight of protein: approximately 33 kDa. Formulation: Supplied in phosphate buffered saline and 20% glycerol as a liquid solution. Store at -80°C. Notes & Usage Guidelines: ELISA: Assay-dependent dilution; WB: Assay-dependent dilution For research use only