A human erythroleukemia cell line(K562 cells)was used as a model to study the effect of interleukin 3(IL 3) on human globin gene expression in the cells. The results showed that the β globin gene was not expressed in uninduced K562 cells; however, it was expressed when K562 cells were induced for 3 or 5 days by IL 3. The expression of α and γ globin gene were not much different between IL 3 induced and uninduced K562 cells. Using the method of benzidine dyeing, it was observed that the percentage o...