and one of the leaders of this study. The scientists studied the genomes of several species of vertebrates, such as the zebrafish or medaka fish, as well as those of the frog, chicken, mouse and humans. But in order to understand the origin of the genomic regulation mechanisms characteristic of vertebrates, they needed to compare them with data from some closely related species that would evolutionarily inform the transition between invertebrates and vertebrates. For this reason, they sequenced the genome of the amphioxus and produced the necessary data to study the regulation of its genes. «The amphox is an organism that has been used as a model in research since the 19th century. Its genome has evolved very slowly and without the duplications that vertebrates have. Thus, the amphioxus serves as a reference in evolutionary comparisons to

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understand the origin of our lineage », points out Héctor Escrivà, one of the leaders of the work and researcher at the Sorbonne University and the CNRS in Banyuls-sur-Mer (France). The Uk Email Lists analysis of certain gene families important for development —as is the case of the Wnt family— has led to the qualification of the amphioxus “as the conservative group in the evolution of the chordates, as opposed to the liberal group represented by the urochordates, who are characterized by a high rate of evolutionary divergence ”, conclude Ricard Albalat and Cristian Cañestro, professors at the Department of Genetics, Microbiology and Statistics at the UB, and Ildiko Somorjai, from the University of St. Andrews (Scotland), whose groups have participated in the analysis of the amphioxus genome. points out Héctor Escrivà, one of the work leaders and researcher at the Sorbonne University

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the CNRS in Banyuls-sur-Mer (France). The analysis of certain gene families important for development —as is the case of the Wnt family— has led to the qualification of the amphioxus “as the conservative group in the evolution of the chordates, as opposed to the liberal group represented by the urochordates, who are characterized by a high rate of evolutionary divergence ”, conclude Ricard Albalat and Cristian Cañestro, professors at the Department of Genetics, Microbiology and Statistics at the UB, and Ildiko Somorjai, from the University of St. Andrews (Scotland), whose groups have participated in the analysis of the amphioxus genome. points out Héctor Escrivà, one of the work leaders and researcher at the Sorbonne University and the CNRS in Banyuls-sur-Mer (France). The analysis of certain gene families important for development —as is the case of the Wnt family—

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