Staphylococcal Protein A binds strongly and specifically to the Fc region of immunoglobulin molecules, especially IgG of many species such as Human, Rabbit, Pig, etc. The product contains five high affinity binding sites that are capable of interacting with the Fc region of IgG. HRP-Protein A is produced by covalently linking HRP to Protein A, which can be used in immuno-detection such as immunoblotting (Western or Dot blot), ELISA, and immunohistochemistry.