Specificity: Reacts with mouse, rat, and dog Claudin-8. On Western blots, it identifies the target band at ~30kD. Reactivity has been confirmed with TCMK-1 mouse kidney, KNRK rat kidney, and MDCK dog kidney cell lysates by Western blotting, and with ethanol-fixed, frozen mouse colon tissue by immunohistochemistry / immunofluorescence.