Clone OTI3F4 has been reported to be a mouse monoclonal antibody specific to the human gene, SF3A1, or Splicing factor 3a subunit 1. Other suppliers describe clone OTI3F4 to be a mouse monoclonal antibody against human HMBS, or hydroxymethylbilane synthase. An indicated application for antibody clone OTI3F4 is Western blot.