We at Novus Biologicals have a large antibody catalog targeted to epitope tags. They include C-Myc, GFP, HA, DYKDDDDK, and V5 Tag antibody reagents. The V5 tag antibody recognizes the artificially engineered V5 epitope, which is formed of amino acid residues 95-108 of the simian virus 5 RNA polymerase alpha subunit.