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Title: Method to detect the end-point for PCR DNA amplification using an ionically labeled probe and measuring impedance change

Patent ·
OSTI ID:903351

Impedance measurements are used to detect the end-point for PCR DNA amplification. A pair of spaced electrodes are located on a surface of a microfluidic channel and an AC or DC voltage is applied across the electrodes to produce an electric field. An ionically labeled probe will attach to a complementary DNA segment, and a polymerase enzyme will release the ionic label. This causes the conductivity of the solution in the area of the electrode to change. This change in conductivity is measured as a change in the impedance been the two electrodes.

Research Organization:
Lawrence Livermore National Laboratory (LLNL), Livermore, CA (United States)
Sponsoring Organization:
USDOE
DOE Contract Number:
W-7405-ENG-48
Assignee:
The Regents of the University of California (Oakland, CA)
Patent Number(s):
7,157,232
Application Number:
11/020,731
OSTI ID:
903351
Country of Publication:
United States
Language:
English

References (2)

Detection of specific polymerase chain reaction product by utilizing the 5'----3' exonuclease activity of Thermus aquaticus DNA polymerase. journal August 1991
DNA Electrochemical Behaviors, Recognition and Sensing by Combining with PCR Technique journal June 2003