Custom Premix Selecting "Custom Premix" option means that all of the beads you have chosen will be premixed in manufacturing before the kit is sent to you.
The Xa Cleavage Control Protein is intended for conducting control digests in parallel with experimental samples, or to test cleavage under customized buffer conditions. The 53.1-kDa Xa Cleavage Control Protein is cleaved into two proteolytic fragments of 35.8 kDa and 17.3 kDa, which are easily visualized by standard SDS-PAGE followed by Coomassie blue staining. The Xa Cleavage Control Protein also features an amino terminal S•Tag™ sequence enabling sensitive detection of the 17.3 kDa proteolytic product with Western Blot reagents.
