Chemistry: molecular biology and microbiology – Measuring or testing process involving enzymes or... – Involving nucleic acid
Reexamination Certificate
2008-03-04
2008-03-04
Whisenant, Ethan (Department: 1634)
Chemistry: molecular biology and microbiology
Measuring or testing process involving enzymes or...
Involving nucleic acid
C536S023100, C536S024300
Reexamination Certificate
active
07338763
ABSTRACT:
The invention relates to a method and a kit for the specific identification and/or quantification of one or several among at least 7 organisms or parts thereof, in a biological sample being possibly contaminated by at least 4 other organisms, by detecting at least one nucleotide sequence specific of each of the organisms possibly present in said biological sample, wherein said nucleotide sequence is homologous with at least 4 other nucleotide sequences. The method comprises the steps of: amplifying the nucleotide sequences specific of said organisms into target amplified nucleotide sequences using at least 2 different primer pairs, each one being capable of amplifying at least 4 of said homologous nucleotide sequences from other organisms and having an homology higher than 85% with each of the said amplified homologous nucleotide sequences to be amplified; providing an array onto which single-stranded capture nucleotide sequences are arranged at pre-determined locations, said single-stranded capture nucleotide sequences being covalently bound to an insoluble support, via a spacer which is at least 6.8 nm in length, and wherein said capture nucleotide sequences comprise a nucleotide sequence of about 10 to 50 bases which is able to specifically bind to one target amplified sequence without binding to said other amplified homologous nucleotide sequences and presenting an homology lower than 85% with the other capture nucleotide sequences of the said other amplified homologous sequences, contacting said target amplified sequences with the array in one solution under conditions allowing hybridization of the target amplified sequences to complementary capture nucleotide sequences present on the array; and detecting and quantifying signals present on specific locations on the array; wherein the intensities of the signals in specific locations allows identification of the organisms.
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Burteau Sophie
Hamels Sandrine
Remacle Jose
Zammatteo Nathalie
Eppendorf Array Technologies S.A.
Knobbe Martens Olson & Bear LLP
Whisenant Ethan
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