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For normal heart function, look beyond the genes

(DOE/Lawrence Berkeley National Laboratory) Berkeley Lab researchers have compiled a comprehensive genome-wide map of more than 80,000 enhancers considered relevant to human heart development and function. They went on to test two of the enhancers in mice, showing that when the enhancers were missing, the heart worked abnormally. The finding bolsters the importance of DNA segments once considered 'junk.
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