Chemistry: molecular biology and microbiology – Measuring or testing process involving enzymes or... – Involving nucleic acid
Reexamination Certificate
2011-07-26
2011-07-26
Switzer, Juliet C (Department: 1634)
Chemistry: molecular biology and microbiology
Measuring or testing process involving enzymes or...
Involving nucleic acid
C435S007100
Reexamination Certificate
active
07985539
ABSTRACT:
The invention encompasses reagents comprising particles with at least one Raman dye and a specific binding members bound thereto and methods of using such reagents. The invention also encompasses reagents of a specific binding member and two or more different Raman dyes and methods for using such reagents. New types of particle probes having a specific binding member bound thereto are described. These reagents are used in a novel detection strategy that utilizes the catalytic properties of the Au nanoparticles to generate a silver coating that can behave as a surface-enhanced Raman scattering (SERS) promoter for the dye-labeled particles that have been captured by target and an underlying chip in microarray format. The strategy provides the high sensitivity and high selectivity attributes of grey-scale scanometric detection but provides a route to multiplexing and ratioing capabilities since a very large number of probes can be designed based upon the concept of using a Raman tag as a spectroscopic fingerprint in detection. These spectra are used as fingerprints to differentiate oligonucleotide or other targets in one solution. This method has been used to distinguish six dissimilar DNA targets with six Raman labeled nanoparticle probes, and also two RNA targets with single nucleotide polymorphisms (SNPs).
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Cao Yunwei
Jin Rongchao
Mirkin Chad A.
Northwestern University
Pletta Gregory T.
Switzer Juliet C
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