Figure 1From: Comparative biochemical analysis of HIV-1 subtype B and C integrase enzymesPurification of recombinant subtype B and C integrase enzymes. N-terminal His tags of the enzymes were removed from purified subtype B and C recombinant proteins by thrombin cleavage. Lane 1, protein ladder (10-250 kDa) (New England Biolabs); INB, subtype B integrase; INC, subtype C integrase.Back to article page