A majority of suppliers have reported the clone AF-9 to be a monoclonal antibody specific to the human gene, THY1, also known as Thy-1 cell surface antigen and CD90. Other suppliers describe clone AF-9 to be a monoclonal antibody against human IFNAR1, or interferon alpha and beta receptor subunit 1. Indicated applications for antibody clone AF-9 include Western blot, immunohistochemistry, flow cytometry, immunofluorescence, and ELISA.