Inadequate dNTPsAn incorrect concentration of deoxynucleotidetriphosphates (dNTPs) can cause problems for the PCR procedure. The usual dNTP concentration is between 40μM and 200μM of EACH of the four dNTPs. Excessive dNTP concentrations can inhibit the PCR preventing the formation of product. However, concentrations up to 400 μM each dNTP have been reported to work adequately. Low primer, target, Taq, and dNTP concentrations are preferable as these generally ensure cleaner product and lower background. For longer PCR-fragments a higher deoxynucleotidetriphosphate concentration may be required. A large change in the dNTP concentration may require a corresponding change in the concentration of MgCl2.
Edited by: Jim Huggett and Justin O'GradyI would highly recommend this book (Doodys); useful new insights (Aus. J. Med. Sci.) read more ...
The application of molecular technology in clinical diagnosis in two key diagnostic areas: cancer and infectious diseases.
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Provides both the novice and experienced user with an invaluable reference to a wide-range of real-time PCR technologies and applications and supplies detailed technical insights into the underlying principles, methods and practice of real-time PCR.
Suboptimal concentration of nucleotides can cause incomplete primer elongation or premature termination of DNA synthesis during the elongation step of the PCR cycle.
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