Medical researchers report that melanoma formation depends on something called 'oncogenic competence,' which is the result of a collaboration between the DNA mutations in a cell and the particular set of genes that are turned on in that cell. Cells that are competent to form melanoma are able to access a set of genes that normally are closed off to mature melanocytes (the cells that make melanin and give skin its color). In order to access these locked-up genes, the cells require specific proteins that act as keys. Without them, the cells do not form melanoma, even when they have cancer-associated DNA mutations.
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