Clone OTI2F3 has been reported to be a mouse monoclonal antibody specific to the human gene, MTF1, or Metal regulatory transcription factor 1. Other suppliers describe clone OTI2F3 to be a mouse monoclonal antibody against human STAT4, or signal transducer and activator of transcription 4. Indicated applications for antibody clone OTI2F3 include Western blot and immunohistochemistry.