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The Journal of Cell Biology, Vol 91, 153-156, Copyright © 1981 by The Rockefeller University Press


ARTICLES

DNA-mediated gene transfer without carrier DNA

KM Huttner, JA Barbosa, GA Scangos, DD Pratcheva and FH Ruddle

DNA-mediated gene transfer is a procedure which uses purified DNA to introduce new genetic elements into cells in culture. The standard DNA- mediated gene transfer procedure involves the use of whole cell DNA as carrier DNA for the transfer. We have modified the standard DNA- mediated gene transfer procedure to transfer the Herpes simplex virus type 1 thymidine kinase gene (TK) into TK- murine recipient cells in the absence of whole cell carrier DNA. The majority (8/10) of carrier- free transformant lines expressed the TK+ phenotype stably, in sharp contrast to our results with carrier-containing DNA-mediated gene transfer. There was a wide range in donor DNA content among independent transformants. Further analysis on one transformant line using DNA restriction digests and in situ hybridization provided evidence that, in the absence of whole cell carrier DNA, multiple donor DNA sequences became integrated at a single chromosomal site.
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