A research team at the Hubrecht Institute, Utrecht, demonstrates a mechanism by which left-right asymmetry in the body is established and maintained. The study, published in the open-access journal PLoS Genetics, offers a new model of how families of genes interact to promote and direct body asymmetry. Although organisms appear bilaterally symmetrical when observed from the outside, internal organs are positioned asymmetrically along the left-right axis, and the organs themselves exhibit intrinsic left-right asymmetries...
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