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Mansour, Suzanne L.; Thomas, Kirk R.; Capecchi, Mario R. | Introduction of a lacZ reporter gene into the mouse int-2 locus by homologous recombination. | We demonstrate that the frequency of gene targeting is unaffected by the length of nonhomologous DNA transferred to a target chromosomal sequence. A result of this finding is that a much wider spectrum of designed genomic alterations is now feasible. As a first application, we inserted a 5.4-kilobas... | Blotting, Southern; Cell Differentiation; Fluorescent Antibody Technique; Restriction Mapping | 1990-10 |