Fig. 4.
Gene targeting by transduction and transfection. HSNO39 cells were either transduced with the AAV-SNO648 vector at a MOI of 4 × 105 vector genomes per cell or transfected with pASNO648 or pASNori2 plasmids, and the fraction of G418-resistant CFU was determined. Transfections were performed by plating 4 × 106 cells per 15-cm dish on day 1, changing the media and transfecting with 20 µg of the indicated plasmid as a calcium-phosphate precipitate on day 2, treating with trypsin and replating dilutions of cells on day 3, and selecting with G418 on day 4 (as in the transduction experiments). pASNO648 was linearized by digestion with SacII before transfection. Mean values with standard errors are plotted.