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v-myb and v-ets cooperate for the mitogenic stimulation of primary fibroblasts by avian E26 retrovirus.

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  • Research Article


By using a series of deletion mutants, we have shown that the stimulation of fibroblast growth by E26 requires the cooperation of the two oncogenes, v-myb and v-ets, fused in the nuclear viral product. Of the two DNA-binding domains, only one must be present to promote anchorage-independent growth, whereas that of v-myb is required to allow growth in low serum medium. Furthermore, the v-ets oncogene comprises multifunctional domains.

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