Active and total TGF-β levels in liver homogenate and inhibition of liver TGF-β by pan TGF-β neutralizing antibodies. A. Active and total TGF-β levels in liver. B Inhibition of total liver TGF-β in the absence or presence of 100 μg/ml pan TGF-β neutralizing antibody. TGF-β level was 97% inhibited by neutralizing antibody. Sample size: n = 6. NAB=neutralizing antibodies, RLU=relative luciferase unit, TGF-β=transforming growth factor-β.