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A. Syncytial microinjection performed during early embryonic stages in the fly D. melanogaster. B. In vivo remobilization during a classical gene targeting experiment in the fly D. melanogaster. F, FRT site; LA, left homology arm; RA, right homology arm. C. In vivo upgrading of transposon insertion sites using the InSITE system in the fly D. melanogaster. L, LoxP site.
