Primary adult HGE cells were plated on to 24 well clusters or plastic slides in DME/F12 medium supplemented with l% serum and other growth factors. The cells were treated with MNNG at concentration of 10-4-10-7M for 24 hours. Cytotoxicity and MNs/ANs formation have been determined. The effect of MNNG varied among individuals shown by the rates of DNA synthesis. MNs could be induced by MNNG in the cells from all donors tested with a different percentage and ANs were apparently increased up to 9.6 folds. This...