Some of you may recall the book/movie Jurassic Park, where biotechnologists cloned dinosaurs from DNA samples extracted from ancient mosquitoes preserved in amber. In order to prevent their products from endangering the outside world, they incorporated a mutation that made them highly dependent on the lysine supplements provided by the park staff. Since lysine is a naturally occurring amino acid, this strategy was not very effective when they did escape (this was not in the m...


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