The embryo's one-sided genes.
The origin of left-right asymmetry during vertebrate embryogenesis has long been a puzzle; now, for the first time, genes have been identified that are expressed with left-right asymmetric patterns in early embryos.
King
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Tim King and Nigel A. Brown, MRC Experimental Embryology and Teratology Unit, and Department of Child Health, St George's Hospital Medical School, Cranmer Terrace, London SW17 ORE, UK.
Brown
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