Posi-Tag is a recombinant protein that contains 12 different tags. It has a predicted weight of 45 kDa and is intended for use as a positive control in western blot applications. The lysate contains the commonly used epitope tags HA, c-myc, Glu-Glu, GST, 6-His, HSV, T7, V5, VSV, E-tag, S-tag, and FLAG? tag.