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First-of-its-kind method cryopreserves fruit fly embryos in liquid nitrogen Cryopreservation, or the long-term storage of biomaterials at ultralow temperatures, has been used across cell types and species. However, until now, the practical cryopreservation of the fruit fly (Drosophila melanogaster)-;which is crucial to genetics research and critical to scientific breakthroughs benefiting human health-;has not been available. To keep alive the ever-increasing number of fruit flies with unique genotypes that aid in these breakthroughs, some 160,000 different flies, laboratories and stock centers engage in the costly and frequent transfer of adults to fresh food, risking contamination and genetic drift, said Li Zhan, a mechanical engineering postdoctoral associate with the University of Minnesota College of Science and Engineering and the Center for Advanced Technologies for the Preservation of Biological Systems (ATP-Bio).

Tom haysJohn bischofLi zhanMingang liEmily hendersonUniversity doctoral dissertation fellowshipNature communicationsUs national institutes of healthUniversity of minnesota college scienceCollege of scienceCollege of biological sciencesNational science foundationInstitute for engineeringStudy coUniversity of minnesotaDepartment of genetics