polymerase chain reactionpolymerase chain reaction
a technique in which a DNA sequence is replicated at elevated temperatures by means of a polymerase, eventually producing millions of copies of the sequence: used in genetic analysis, DNA fingerprinting, in detecting minute quantities of cancer cells, etc.
polymerase chain reaction
A technique for amplifying DNA sequences in vitro by separating the DNA into two strands and incubating it with oligonucleotide primers and DNA polymerase. It can amplify a specific sequence of DNA as many as one billion times and is important in biotechnology, forensics, medicine, and genetic research.
(plural polymerase chain reactions)