Self-addressable self-assembling microelectronic integrated systems, component devices, mechanisms, methods, and procedures for molecular biological analysis and diagnostics
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United States of America Patent
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Feb 14, 2012
Grant Date -
Aug 2, 2007
app pub date -
Mar 22, 2007
filing date -
Nov 1, 1993
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Abstract
A method for electronically stabilizing hybridization of nucleic acids bound at a test site of a microelectronic device is described. First and second negatively charged nucleic acids are provided, the second nucleic acid being bound to the test site. A zwitterionic buffer having a conductance of less than 100 mS/cm is applied to the microelectronic device. A current is applied to the test site to positively bias the test site, such that the first negatively charged nucleic acid is transported to the positively biased test site having the bound the second negatively charged nucleic acid. At the test site, the first and second negatively charged nucleic acids hybridize. The zwitterionic buffer acquires a net positive charge under influence of the current, such that the positively charged zwitterionic buffer stabilizes the hybridization by reducing the repulsion between the first and second negatively charged nucleic acids.
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