Clone 4F3.E8 is a mouse monoclonal antibody specific to the human gene, HSP90AA1, or Heat shock protein 90 alpha family class A member 1. Another name for the gene is HSP90. Suppliers have reported additional species reactivites for the target of this clone, including mouse and rat. Indicated applications for antibody clone 4F3.E8 include Western blot, immunohistochemistry, immunofluorescence, ELISA, immunocytochemistry, and immunoprecipitation.