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P(acman) takes a bite out of deciphering Drosophila DNA

P(acman) ?a new method of introducing DNA into the genome of fruit flies or Drosophila ?promises to transform the ability of scientists to study the structure and function of virtually all the fly’s genes, and the method may be applicable to other frequently studied organisms such as mice, said its Baylor College of Medicine developers in an article in the current issue of the journal Science.

“P(acman) overcomes a key limitation of currently available methods because it allows you to study large chunks of DNA in vivo,?said Dr. Hugo Bellen, professor of molecular and human genetics at Baylor College of Medicine and director of the program in developmental biology. He is also a Howard Hughes Medical Institute investigator. The new technique allows researchers to study large genes and even gene complexes in the fruit fly, which was not possible before.

P/phiC31 artificial chromosome for manipulation, or P(acman), combines three recently developed technologies: a specially designed bacterial artificial chromosome (BAC) that allows maintenance of large pieces of DNA in bacteria, recombineering that allows the manipulation of large pieces of DNA that can then be inserted into the genome of the fly at a specific site using phiC31-mediated transgenesis.

It is a new technique with far-reaching promise, said Bellen.

P(acman) overcomes certain obstacles that have hampered research. It allows the cloning of large pieces of DNA to be used to transform the genome, and it permits that DNA to be inserted into specific places in the genome. Bellen credits the report’s first author, Koen J.T. Venken, a graduate student in the BCM Program in Developmental Biology, with putting the technologies together to come up with a new methodology in the field.

Current technology has certain problems for researchers seeking to understand the structure and function of genes, said Bellen. Often, when scientists breed flies that lack a particular gene
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Source:Baylor College of Medicine


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