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Genetic EngineeringI. Basic Principles A. DNA can be cutB. Can be rearranged as desired C. Cohen & Boyer 1. First genetic engineering 2. Found restriction enzymes II. Materials A. **Restriction Enzymes** 1. Enzymes found in prokaryotes 2. Ex. EcoR1, HindIII B. Types 1. Type I make random cuts 2. Type II make cuts at recognition sites 3. R. E. search for palindromes (red same way, forward and backwards) 4. 4-6 n.t. long 5. Cuts both ends leaving sticky ends!!!! 6. Evolutionary advantage in prokaryotes for resistance C. Vector 1. Anything that is used to produce the gene recombined DNA 2. Plasmid 3. Bacteriophage virus that infects bacteria D. Recipient (Host) 1. Bacteria, usually E. coli III. Purpose A. Mass produce a desired gene produced by humans (Transformation) 1. Ex. insulin, interferon (cancer), HGH (Human Growth Factor) B. Treatment of Genetic Diseases 1. Gene Therapy 2. Incorporate a passenger gene into the body to replace a mutant gene a) Cystic fibrosis C. Produce artificial virus for vaccines 1. Chicken Pox (Verasela) 2. AIDS D. Agriculture 1. Flav-Savor Tomatoes 2. Blight resistant potatoes IV. How? A. Select desired gene B. Use vector & ligase to inject it into host genome C. Screen for transformation D. Clone produce a genetically identical version E. When you make recomb. DNA, you want to make a library (list of all recomb DNA made) Chimera CAP Layout by J.T. Poirier © 2001 |