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Related Concept Videos

PCR01:32

PCR

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Overview
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Translesion (TLS) polymerases rescue stalled DNA polymerases at sites of damaged bases by replacing the replicative polymerase and installing a nucleotide across the damaged site. Doing so, TLS allows additional time for the cell to repair the damage before resuming regular DNA replication.
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Unlike eukaryotes, bacteria use a single RNA Polymerase (RNAP) to transcribe all genes. The different subunits of bacterial RNAPhave distinct functions. The multisubunit structure of the bacterial RNAP helps the enzyme to maintain catalytic function, facilitate assembly, interact with DNA and RNA, and self-regulate its activity.
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The conversion of alkenes to macromolecules called polymers is a reaction of high commercial importance. The structure of the polymer is defined by a repeating unit, while the terminal groups are considered insignificant. The average degree of polymerization represents the number of repeating units in the polymer molecule and is denoted by the subscript n.
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RNA Polymerase (RNAP) is conserved in all animals, with bacterial, archaeal, and eukaryotic RNAPs sharing significant sequence, structural, and functional similarities. Among the three eukaryotic RNAPs, RNA Polymerase II is most similar to bacterial RNAP in terms of both structural organization and folding topologies of the enzyme subunits. However, these similarities are not reflected in their mechanism of action.
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Energy Basics

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Chemical reactions, such as those that occur when you light a match, involve changes in energy as well as matter.
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Polymerase Chain Reaction: Basic Protocol Plus Troubleshooting and Optimization Strategies
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The Basic Polymerase Chain Reaction (PCR).

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    Summary
    This summary is machine-generated.

    This protocol details the fundamental Polymerase Chain Reaction (PCR) method. It outlines the essential reagents and steps for amplifying DNA segments using thermostable DNA polymerase.

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    Area of Science:

    • Molecular Biology
    • Biochemistry
    • Genetics

    Background:

    • DNA amplification is crucial for various biological and diagnostic applications.
    • The development of a reliable DNA amplification method is a cornerstone of modern molecular biology.

    Purpose of the Study:

    • To describe the foundational protocol for DNA amplification.
    • To detail the reagents and procedures for the initial Polymerase Chain Reaction (PCR).

    Main Methods:

    • Utilizing a thermostable DNA polymerase for enzymatic DNA synthesis.
    • Employing a chain reaction process to exponentially amplify target DNA segments.
    • Describing the necessary reagents and precise procedural steps for successful DNA amplification.

    Main Results:

    • Successful amplification of double-stranded DNA segments is achieved.
    • The described protocol serves as the basis for all subsequent PCR variations.
    • The method is robust and reproducible for DNA amplification.

    Conclusions:

    • The described protocol establishes the fundamental Polymerase Chain Reaction (PCR).
    • This foundational method enables widespread DNA analysis and manipulation.
    • Understanding this basic PCR protocol is essential for molecular biology research.