Clone 54.1 has been reported to be a mouse monoclonal antibody specific to the human gene, CYBB, or Cytochrome b-245 beta chain. Other suppliers describe clone 54.1 to be a mouse monoclonal antibody against human GRIN1, or glutamate ionotropic receptor NMDA type subunit 1. Indicated applications for antibody clone 54.1 include Western blot, immunohistochemistry, immunofluorescence, ELISA, and immunocytochemistry.