StrepMAB-Classic is a highly selective, murine monoclonal antibody for detection of Strep-tagII and Twin-Strep-tag fusion proteins in applications like western blots, ELISA, FACS, immunohistochemistry, and immunocytochemistry. It is available unconjugated, coupled to fluorescent dyes (DY-488, DY-549, DY-649) or to horseradish peroxidase (HRP). StrepMAB-Classic HRP is suitable for chromogenic and chemiluminescent reactions. The absorption/emission maxima of the fluorescent dyes are: • DY-488: 493/518 nm • DY-549: 550-560/575 nm • DY-649: 655/676 nmPlease note: For capturing of Strep-tagII and Twin-Strep-tag fusion proteins on solid phases, the use of StrepMAB-Immo or Strep-TactinXT is recommended due to the binding affinity in the pM range.