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A regulatory DNA sequence preserved in jawed vertebrates

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A regulatory DNA sequence preserved in jawed vertebrates

A regulatory DNA sequence preserved in jawed vertebrates labels the jaw joint cells (magenta) on the background of craniofacial cartilages and blood vessels (green) in the head of living zebrafish larva, seen from below.
Photo/image: Laura Waldmann
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Photo/image: Laura Waldmann
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  • A regulatory DNA sequence preserved in jawed vertebrates labels the jaw joint cells (magenta) on the background of craniofacial cartilages and blood vessels (green) in the head of living zebrafish larva, seen from below. Photo/image: Laura Waldmann

    DNA sequence enhances understanding origins of jaws

    Researchers at Uppsala University have discovered and characterised a DNA sequence found in jawed vertebrates, such as sharks and humans, but absent in jawless vertebrates, such as lampreys. This DNA is important for the shaping of the joint surfaces during embryo development.