The Claudin-18.2 Recombinant Monoclonal Antibody from CUSABIO Technology LLC Monoclonal antibody to Claudin 18, and CLDN18. This antibody recognizes Human antigen. The Claudin-18.2 Recombinant Monoclonal Antibody has been validated for the following applications: EIA, Immunoassay, ELISA, and Flow Cytometry.