Catalog number: SBB-PP0005, 50 μgHighly active protein complex that has been purified from human red blood cells (RBC). The Human 20S proteasome is able to proteolytically degrade substrates in an ATP-independent manner. The 20S core can be activated chemically with SDS (0.035%) or by the addition of PA28. Initial experiments should be carried out at 20S proteasome concentrations between 2-5 nM.