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Effect of TGFα-PE38 (T-PE) on hematopoietic stem cell (HSC) viability. HSC were incubated with 5 ng/ml T-PE for five days. n=4 without T-PE and n=9 with T-PE. The percentage of remaining live cells was determined by the XTT assay. Bars are standard error of the mean. TGF, tumor growth factor; PE, Pseudomonas endotoxin.
