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What should be considered when using DNA stored in TE buffer for digestion?

Answer and explanation

Correct answer: The EDTA concentration can affect the enzyme reaction

The governing concept is compatibility between the DNA storage buffer and restriction-enzyme requirements. TE buffer commonly contains Tris to maintain pH and EDTA to bind divalent metal ions such as magnesium. Restriction enzymes generally require magnesium as a cofactor, so excessive EDTA can chelate available magnesium and reduce or inhibit cleavage. The amount of TE carried into the reaction should therefore be considered, especially when the DNA solution is added in a large volume. TE does not automatically destroy DNA, Tris does not produce protein, and water is not absent from a properly prepared reaction. Checking buffer compatibility helps preserve reliable digestion.

Related tags

Te BufferEdtaRestriction DigestionCutting Of DnaProcesses Of Recombinant Dna TechnologyBiotechnologyClass 11 Mcq

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