Scientists uncover a trove of genes that could hold key to how humans evolved.Dozens of genes previously thought to have similar roles across species are in fact unique to humans. These genes code for a class of proteins known as transcription factors, or TFs, which control gene activity.

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Scientists uncover a trove of genes that could hold key to how humans evolved.Dozens of genes previously thought to have similar roles across species are in fact unique to humans. These genes code for a class of proteins known as transcription factors, or TFs, which control gene activity.