Clone OTI5B1 has been reported to be a mouse monoclonal antibody specific to the human gene, RPN1, or Ribophorin I. Other suppliers describe clone OTI5B1 to be a mouse monoclonal antibody against human BHLHE41, or basic helix-loop-helix family member e41. An indicated application for antibody clone OTI5B1 is Western blot.