Learn how to use this product Synthetic Strep-tag®II peptide recognized by Strep-Tactin®, Strep-Tactin®XT as well as the monoclonal antibodies, StrepMAB-Classic (IB 2-1507-001) and StrepMAB-Immo (IB 2-1517-001). It can be used for competitive elution of Strep-tag®II fusion proteins or as a control protein in dot blot assays.