Please try again later. Butane Heating Services deliver Calor Gas equipment to North London, Visit the website at www.ButaneHeatingServices.co.uk, post your questions and suggestions in the comments or Freefone on: 0800 345 7177.Category. License.lease try again later. Butane Heating Services deliver Calor Gas equipment to North London, Visit the website at www.ButaneHeatingServices.co.uk, post your questions and suggestions in the comments or Freefone on: 0800 345 7177.
The polymerase chain reaction (PCR) is a technology in molecular biology used to amplify a single copy or a few copies of a piece of DNA across several orders of magnitude, generating thousands to millions of copies of a particular DNA sequence. If the genomic DNA sequence of a gene is known, RT-PCR can be used to map the location of exons and introns in the gene. 2  The 5' end of a gene (corresponding to the transcription start site) is typically identified by RACE-PCR (Rapid Amplification of cDNA Ends).
Working principle of PCR. As the name implies, it is a chain reaction, a small fragment of the DNA section of interest needs to be identified which serves as the template for producing the primers that initiate the reaction. One DNA molecule is used to produce two copies, then four, then eight and so forth.