Fusion Protein Purification. The Fusion-Aid™ Kits are designed to immunoprecipitate/isolate fusion proteins containing the appropriate protein tag. The Fusion-Aid™ Kit has affinity-purified primary antibodies coupled directly to agarose beads. In contrast to traditional methods, this eliminates the contamination of the isolated proteins with coprecipitating primary antibodies. The spin columns provided with the kit also facilitate rapid immunoprecipitation and maximum protein recovery. Vector® Fusion-Aid™ Kits contain the following: 0.5 ml agarose beads coupled with affinity purified antibody to the specific tag 5 spin columns 5 collection tubes a detailed protocol This Fusion-Aid kit is designed to isolate fusion proteins containing Green Fluorescent Protein. This kit contains an affinity-purified antibody to Green Fluorescent Protein coupled through a stable hydrophilic spacer arm to crosslinked 4% agarose beads.