A quantitative polymerase chain reaction (qPCR), also called real-time polymerase chain reaction, is a laboratory technique of molecular biology based on the polymerase chain reaction (PCR), which is used to amplify and simultaneously quantify a targeted DNA molecule. For one or more specific sequences in a DNA sample, quantitative PCR enables both detection and quantification. The quantity can be either an absolute number of copies or a relative amount when normalized to DNA input or additional normalizing genes.

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PCR (polymerase chain reaction) is an invaluable tool for molecular biology research. It is used daily in laboratories around the world in a wide array of applications such as cloning, gene expression analysis, genotyping, sequencing, and mutagenesis. We offer products to help you achieve PCR success for virtually any application. With trusted Applied Biosystems ® thermal cyclers and real-time PCR systems, industry-leading Invitrogen ™ SuperScript ® and Platinum ® Taq enzymes, and millions of reliable TaqMan ® Assays, you will find everything you need to help you achieve PCR success.