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04-04-2008, 04:50 AM
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| This is for you micro biology experts.?
Pseudomonas has a plasmid containing the mer operon, which includes the gene for mercuric reductase. This enzyme catalyzes the reduction of the mercuric ionsHg2 to the uncharged form of mercury, Hg0. Hg2 is quite toxic to cells; Hg0 is not. 1. What do you suppose is the inducer for this operon? 2.Why would a cell bring a toxin? 3.What is the value of the mer operon to Pseudomonas? 2. The protein encoded by one of the mer genes binds Hg2 in the periplasm and brings it into the cell. Why would a cell bring in a toxin?      |
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