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GENE TRANSFER AND GENETIC ENGINEERING CHAPTER 8 1 Gene Transfer Vertical to offspring Lateral (horizontal) to others in same generation 2 Bacterial Gene Transfer and Recombinant DNA Technology Transformation – Griffith’s experiment 3 Transformation Mechanism Significance Recombination? 4 Transduction Mechanism Transducing phages: p1, p22 Significance Can be used in genetic mapping http://jb.asm.org/cgi/reprint/174/23/7876 5 Conjugation Mechanism Conjugation pilus Significance Also used for mapping 6 Plasmids F plasmid (conjugation) Resistance plasmids Virulence plasmids 7 Plasmids (cont.) Tumor-inducing plasmids Agrobacterium tumefaciens and plants Plasmids conferring novel catabolism Degradation pathways on a plasmid 8 Genetic Engineering Genetic fusions reporter fusions promoter fusions 9 Genetic Engineering Protoplast fusion electroporation 10 Genetic Engineering (cont.) Gene Amplification Recombinant DNA cloning 11 Applications Medical Industrial Agricultural Hybridomas 12 Risks and Benefits Frankenstein? Frankenfoods? 13 Recombinant DNA technology Plasmids- autonomous replicating extrachromasomal DNA restriction enzymes 14 Viral technology- phage cloning 15 Homologous recombination Used to make gene knockouts in bacteria and yeast 16 Transposons - jumping genes 17 Evidence for extensive transfer of antibiotic resistance genes in Bacteroides sp. http://mcb.illinois.edu/faculty/profile/abigails 18