Protein A (recombinant), 5 mg
Recombinant protein A binds immunoglobulins (primarily IgG) at the Fc region with high affinity. In some cases, IgM and IgA will also bind. This property provides a rapid, simple and economical method for purification and analysis of a broad-spectrum of antibodies. Fractionation of IgG subclasses can also be performed using recombinant protein A. Because of its high affinity for immunoglobulins of many species and its low level of non-specific binding, recombinant protein A is useful for the study of cell surface antigens and receptors, and for detecting antibody-secreting cells. Recombinant protein A is produced in an E. coli strain which contains the gene for mature protein A from Staphylococcus aureus Cowan I strain.
Peroxidase-conjugated Protein A, 2 mg
Product is a conjugate of Protein A and highly purified (Rz >3.0) horseradish peroxidase. This product is a conjugate of Protein A and highly purified (Rz >3.0) horseradish peroxidase. Protein A is a component of the cell wall of Staphylococcus aureus (Cowan 1 Strain), and binds to the Fc portion of immunoglobulin molecules of most mammalian species. It is composed of a single polypeptide chain of molecular weight 42,000. Protein A binds IgG molecules and, in some cases, IgM and IgA.