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Title: Hybridization-based biosensor containing hairpin probes and use thereof

Patent ·
OSTI ID:1016139

A sensor chip that includes: a fluorescence quenching surface; a nucleic acid probe that contains first and second ends with the first end bound to the fluorescence quenching surface, and is characterized by being able to self-anneal into a hairpin conformation; and a first fluorophore bound to the second end of the first nucleic acid molecule. When the first nucleic acid molecule is in the hairpin conformation, the fluorescence quenching surface substantially quenches fluorescent emissions by the first fluorophore; and when the first nucleic acid molecule is in a non-hairpin conformation, fluorescent emissions by the fluorophore are substantially free of quenching by the fluorescence quenching surface. Various nucleic acid probes, methods of making the sensor chip, biological sensor devices that contain the sensor chip, and their methods of use are also disclosed.

Research Organization:
Univ. of Rochester, NY (United States)
Sponsoring Organization:
USDOE
DOE Contract Number:
FG02-02ER63410
Assignee:
University of Rochester (Rochester, NY)
Patent Number(s):
7,811,764
Application Number:
11/838,616
OSTI ID:
1016139
Country of Publication:
United States
Language:
English

References (7)

Dissemination among staphylococci of DNA sequences associated with methicillin resistance. journal March 1994
Hybridization-Based Unquenching of DNA Hairpins on Au Surfaces:  Prototypical “Molecular Beacon” Biosensors journal April 2003
A Single-Molecule Sensitive DNA Hairpin System Based on Intramolecular Electron Transfer journal July 2003
Molecular detection of antibiotic resistance: when and where? journal June 2005
Detection of methicillin resistance in staphylococci by using a DNA probe. journal September 1990
Thermodynamic basis of the enhanced specificity of structured DNA probes journal May 1999
Single-mismatch detection using gold-quenched fluorescent oligonucleotides journal April 2001

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