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Centro Nacional de Investigaciones Oncologicas (CNIO)
Caption: This is a phylogenetic tree showing the moment at which the duplication of the original gene in the vertebrate ancestor (x2) took place, as well as the evolution of the resulting duplicate genes: ASF1a (above) and the gene that is related to cancer, ASF1b (below). The areas marked in green indicate positions that have mutated in each of the lineages.
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Related news release: A CNIO study tracks the evolutionary history of a cancer-related gene