Correlation between TUNEL activity and the level of Bcl-2 expressed in BL cells. The flow cytometric TUNEL assay was performed and analyzed on the cell lines indicated in the figure as described in the legend to Fig 7. The relative levels of Bcl-2 expression (see Fig 2) were EW-36 << JD-38 <<ST-486 ∼ JLP-119. (•) ST-486; (○) JLP 119; (▴) JD-38; (▵) EW-36.