Expression of liver-specific genes associated with liver function in immortalized and reverted cells. Lanes 1 to 5, simian virus 40 large T antigen (SV40T) and SV40T’, glutamine synthetase) (GS and GS’, human blood coagulation factor X (HBCF-X) and HBCF-X’, β-action and GST’ (glutathione-S-transferase), human albumin (ALB) and ALB’, respectively.