Clone 17D9 has been reported to be a rat monoclonal antibody specific to the mouse gene, CLEC1B, or C-type lectin domain family 1, member b. Other suppliers describe clone 17D9 to be a rat monoclonal antibody against mouse CASP4, or caspase 4, apoptosis-related cysteine peptidase. Indicated applications for antibody clone 17D9 include Western blot, immunohistochemistry, flow cytometry, immunofluorescence, ELISA, and immunoprecipitation.