Protein Purification Reagents – Protein G Resin (UBPBio catalog# P5040-1, P5040-5, P5040-25) – Protein G XPure Agarose Resin consists of recombinant protein G covalently bound to crosslinked agarose beads, which minimizes leakage of Protein A/G and allow reuse the resin. The protein G resin has a binding capacity of ~ 20 mg human IgG/ml resin and works well in batch or FPLC column purifications.