Abstract:Two different yeasts have a number of genes bearing striking structural and functional homologies to mammalian oncogenes. In yeast these genes are involved in the control of proliferation and early steps in the cell cycle. Many have putative protein kinase activity and some have been shown to control the activity of the enzyme adenylate cyclase which synthesizes cyclic AMP. Mutant forms of these yeast genes have oncogenic activity in mammalian cells.
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