Figure 4: Concentration series obtained from sequential injections of HSA in HepaRG medium at concentrations, from bottom to top, of 0.8, 1.5, 3.0, 6.0, 12.0, 24.1, 48.1, 96.2, 192.5 and 385.0 nM (means from six channels; error bars indicate corresponding standard deviations; signals obtained using the reference BrdU-specific antibody were subtracted from those obtained using the HSAspecific antibody).