Dideoxy sequencing, Biology

Dideoxy Sequencing is the enzymatic determination and consideration of DNA or RNA sequence by the rechnique of Sanger and colleagues, based on incorporation of the chain terminating dideoxynucleotides in a growing nucleic acid strand copied by DNA polymerase or the reverse transcriptase from a DNA or RNA template. Different reactions involve dideoxynucleotides containing A, C, G, or the T bases. The reaction products represent the collection of new labeled DNA strands of the varying lengths, all terminating with the dideoxynucleotide at the 3' end (at site of a complementary base in the template nucleic acid), and are separated in the polyacrylamide or urea gel to generate the sequence "ladder". This technique is more commonly used than the "Maxam-Gilbert" (chemical) sequencing.

Posted Date: 8/3/2012 6:40:31 AM | Location : United States

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