Fig. 7. Cell cycle analysis of the cell clones. Confluent cell clones were treated with differentiation cocktail for 18 hours. The cells were fixed and stained with PI. The percentage of cells in each phase was determined by flow cytometry. Data represent means of determinations made on three independent clones. The analysis was reproduced twice with similar results. AS, cells expressing antisense mRNA; S, cells expressing AhR sense mRNA; V, cells expressing vector mRNA.