S1 tag is an epitope tag composed of a nine-residue peptide, NANNPDWDF, derived from the hepatitis B virus preS1 region. Epitope tags consisting of short sequences recognized by well-characterizated antibodies have been widely used in the study of protein expression in various systems.
The Rabbit Anti-S1-tag polyclonal antibody is highly purified from rabbit antiserum by immunoaffinity chromatography.