PCR overview

Polymerase Chain Reaction (PCR)

A technique used to amplify a specific sequence of DNA through in vitro DNA synthesis reactions.

Taq Polymerase

A heat-resistant DNA polymerase extracted from the bacterium Thermus aquaticus, used in PCR.

Denaturing

The first step in PCR where DNA strands separate at 95°C.

Annealing

The second step in PCR where primers bind to the template DNA at 55°C.

Extension

The third step in PCR where new DNA strands are synthesized at 72°C.

PCR Components

Includes template DNA, nucleotides, PCR buffer, magnesium chloride, primers, and DNA polymerase.

Thermus aquaticus

A bacterial species that produces heat-resistant DNA polymerase, allowing it to survive in hot springs.

Thermal Cyclers

Devices that control temperature changes required for PCR, allowing for quick and programmable cycles.

PCR Optimization

The process of adjusting cycling temperatures and times to enhance the efficiency of PCR amplification.

DNA Nucleotides

The building blocks (dNTPs: dTTP, dCTP, dATP, dGTP) required for synthesizing new DNA strands during PCR.