The E.coli derived HRP recombinant protein is a non-glycosylated polypeptide chain, containing the HIV-1 p24 immunodominant regions and fused to a GST tag at N-terminus. 1.5M urea, 25mM Tris-HCl pH-8.0 and 50% Glycerol.ELISA, Western blots, Flow-through.;