Mutated gene raises autism risk, US study finds:
People with two copies of the mutated gene [MET] have 2 to 2.5 times the normal risk of autism and people with one mutated copy have 1.7 times the risk, he said.
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Levitt said the mutation does not change the function of the gene, but changes gene expression — how active the gene is.
The study is going to be published in PNAS.
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