The inhibition of erythroid differentiation factor (EDF), which was extracted and purified from rabbit reticulocytes, on the growth of the mouse established fibroblast cell line L929 and human nasopharyngeal cell line KB was analysed in vitro.

• 从兔网织红细胞提纯的红细胞分化调节因子(erythroid differentiation factor,EDF),能对体外培养的自发转化成纤维细胞系L929及人鼻咽癌细胞系KB产生作用。