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What is dideoxynucleotide sequencing?

Table of Contents

  • What is dideoxynucleotide sequencing?
  • Why are dideoxynucleotide triphosphates used when sequencing DNA?
  • What is the difference between Deoxynucleotide and dideoxynucleotide?
  • Why are ddNTPs used in sequencing?
  • What is the difference between dideoxynucleotide and Deoxynucleotide?

What is dideoxynucleotide sequencing?

Chain-termination DNA sequencing, also called the dideoxynucleotide procedure, is based on the principle that during DNA synthesis, addition of a nucleotide triphosphate requires a free hydroxyl group on the 3′ carbon of the sugar of the last nucleotide of the growing DNA strand (Fig. 11.1).

What does a dideoxynucleotide do?

Dideoxynucleotides are used in molecular biology for Sanger-type DNA sequencing, and in medicine as anti-retroviral drugs for the treatment of HIV infection (e.g., ddI, ddC, and AZT).

Why are dideoxynucleotide triphosphates used when sequencing DNA?

2′,3′-Dideoxynucleoside triphosphates inhibit the chain elongation of a given primer catalyzed by the DNA polymerase (e.g., Klenow enzyme) and are therefore used for DNA sequencing according to Sanger (1). Sequencing is achieved by including in each reaction a dideoxynucle- otide that acts as a chain terminator.

What is the difference between a dideoxynucleotide ddNTP used in sequencing and regular Deoxynucleotides?

The dideoxynucleotides, or ddNTPSs, differ from the deoxynucleotides by the lack of a free 3′ OH group on the five-carbon sugar. If a ddNTP is added to a growing a DNA strand, the chain is not extended any further because the free 3′ OH group needed to add another nucleotide is not available.

What is the difference between Deoxynucleotide and dideoxynucleotide?

As nouns the difference between dideoxynucleotide and deoxynucleotide. is that dideoxynucleotide is (biochemistry) any nucleotide formed from a deoxynucleotide by loss of a second hydroxy group from the deoxyribose group while deoxynucleotide is (biochemistry|genetics) any nucleotide that contains a deoxy sugar.

What is the role of a dideoxynucleotide in DNA sequencing quizlet?

What is the function of dideoxynucleotides in Sanger DNA sequencing? They act as primers for DNA polymerase.

Why are ddNTPs used in sequencing?

DdNTP is used in Sanger sequencing, also known as chain-termination sequencing. In the Sanger sequencing method, DdNTP is used as a substance to stop the synthesis of DNA because of its lack of a free hydroxyl group needed for the replication of DNA. DdNTPs are often dyed to help in the DNA sequence analysis.

What happens when a dideoxynucleotide is added to a developing DNA strand?

What happens when a dideoxynucleotide is added to a developing DNA strand? The chain is not extended any farther. If a ddNTP is added to a growing a DNA strand, the chain is not extended any further because the free 3′ OH group needed to add another nucleotide is not available.

What is the difference between dideoxynucleotide and Deoxynucleotide?

What is a dideoxynucleotide quizlet?

Dideoxynucleotide DNA Sequencing. – Used to identify all the nucleotides within a DNA sample.

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