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Why is salt concentration important in a restriction enzyme reaction?

Answer and explanation

Correct answer: It can affect the enzyme's binding to DNA, activity, and specificity

Salt concentration affects the ionic interactions between a restriction enzyme and DNA. Too little or too much salt can reduce enzyme activity and, under some conditions, may cause cutting at sites other than the recognition sequence (star activity). Therefore, the manufacturer-recommended buffer should be used. Exam tip: a proper restriction-enzyme buffer provides suitable salt, pH, and essential components such as Mg²⁺.

Related tags

Restriction EnzymesDna CuttingSalt ConcentrationEnzyme SpecificityRecombinant Dna TechnologyBuffersCutting Of DnaProcesses Of Recombinant Dna Technology

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