Difference between revisions of "Team:UMaryland/Design"

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<h1><b>What is PCR?</b></h1>
 
<h1><b>What is PCR?</b></h1>
 
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Polymerase Chain Reaction or PCR is a common tool used in the field of biology to amplify DNA or RNA. Invented by Dr. Kary Mullis, PCR is conducted trough cycling DNA, primers and enzyme through various temperatures. Generally starting with a value near 95 degrees Celsius; used to break the Hydrogen bonds between double strands a process called denaturation. The machine then cools down to annealing temperature, with values near 50-60 degrees, at this point primers are able to attach to the template strand of DNA. This stage is then followed by extension temperature, around 72 degrees, at this point the polymerase is able to extend and add nucleotides to the primer.  
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Polymerase Chain Reaction or PCR is a common tool used in the field of biology to amplify DNA or RNA. Invented by Dr. Kary Mullis, PCR is conducted trough cycling DNA, primers and polymerase through various temperatures. The reaction is started by heating the reaction mix to 95 degrees Celsius. The high heat overcomes base stacking interactions and hydrogen bonds which maintain the double helix, a process called denaturation. The machine then cools down to an annealing temperature in order for primers, short ssDNA oligos, to recognize selected DNA sequences, form duplex, and allow for polymerase to bind. Annealing is followed by extension, which is performed by the polymerase at its active temperature, typically around 72 degrees. The polymerase forms a daughter strand by adding nucleotides to the primer in the 5'-3' direction.  
 
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Revision as of 02:25, 18 September 2015