These molecules are bound to a solid support for the enrichment step of the SISCAPA technique. Dozens of these molecules are labeled with unique barcodes to make a CODEX panel. Large concentrations of these molecules can impair their function in a phenomenon called either the hook or prozone effect. One technique for producing these molecules screens out HGPRT-negative cells using HAT (“hat”) medium. In one technique, powdered (*) milk or BSA are blocking agents which prevent these molecules from interacting with the analyte. “Secondary” forms of these molecules are linked to a fluoro·phore for detection in a Western blot. Many identical copies of these molecules are produced using hybrid·oma technology. For 10 points, name these molecules whose “monoclonal” type all bind (10[1])the same antigen. ■END■