A majority of suppliers have reported the clone Hyb-K41220A to be a mouse monoclonal antibody specific to the human gene, HSP90AA1, or Heat shock protein 90 alpha family class A member 1. Other suppliers describe clone Hyb-K41220A to be a mouse monoclonal antibody against human HSP90AB1, or heat shock protein 90 alpha family class B member 1. Suppliers have reported additional species reactivites for the target of this clone, including mouse, rat and yeast. Indicated applications for antibody clone Hyb-K41220A include Western blot, immunohistochemistry, immunofluorescence, ELISA, and immunocytochemistry.