Categorising nucleic acids
First Claim
1. A method for categorising one or more nucleic acids, which method comprises immobilising double-stranded nucleic acids on a solid phase support. Cleaving the immobilised nucleic acids with an endonuclease such that each cleaved nucleic acid has a double-stranded portion, denaturing the cleaved nucleic acids to form single-stranded cleaved nucleic acid, hybridising one or more oligonucleotide sequences to the resulting single-stranded cleaved nucleic acid, each oligonucleotide sequence comprising a pre-determined recognition sequence situated such that it recognises a sequence which was part of the portion of the nucleic acid which was double-stranded after cleavage with the endonuclease and a label specific to the recognition sequence, extending correctly hybridised oligonucleotide sequences along the single-stranded portion of the immobilised nucleic acid to form an extended strand, denaturing the extended strand from the immobilised strand and characterising the immobilised nucleic acid by identifying the size of the extended stand and the identity of the recognition sequence.
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Accused Products
Abstract
The present invention concerns a method for characterizing one or more nucleic acids. This method involves immobilizing double-stranded nucleic acids on a solid phase support and cleaving the immobilized nucleic acids with an endonuclease, such that each cleaved nucleic acid has a double-stranded portion. The cleaved nucleic acids are then denatured to form single-stranded cleaved nucleic acids. One or more oligonucleotide sequences are then hybridized to the resulting single-stranded cleaved nucleic acid. The oligonucleotide sequences used each comprise a pre-determined recognition sequence situated such that it recognizes a sequence which was part of the double-stranded portion of the nucleic acid and a label specific to the recognition sequence. The hybridized oligonucleotide sequences are then extended along the single-stranded portion of the immobilized nucleic acid to form an extended strand which is then denatured from the immobilized strand. The immobilized nucleic acid is then characterized by identifying the size of the extended strand and the identity of the recognition sequence.
184 Citations
20 Claims
- 1. A method for categorising one or more nucleic acids, which method comprises immobilising double-stranded nucleic acids on a solid phase support. Cleaving the immobilised nucleic acids with an endonuclease such that each cleaved nucleic acid has a double-stranded portion, denaturing the cleaved nucleic acids to form single-stranded cleaved nucleic acid, hybridising one or more oligonucleotide sequences to the resulting single-stranded cleaved nucleic acid, each oligonucleotide sequence comprising a pre-determined recognition sequence situated such that it recognises a sequence which was part of the portion of the nucleic acid which was double-stranded after cleavage with the endonuclease and a label specific to the recognition sequence, extending correctly hybridised oligonucleotide sequences along the single-stranded portion of the immobilised nucleic acid to form an extended strand, denaturing the extended strand from the immobilised strand and characterising the immobilised nucleic acid by identifying the size of the extended stand and the identity of the recognition sequence.
- 18. A kit for categorising a nucleic acid, which kit comprises one or more adaptors and one or more sets of oligonucleotide sequences, wherein the adaptors comprise nucleic acid having a double-stranded primer portion of a known sequence and a single-stranded portion of a pre-determined length, either each single-stranded portion of each nucleic acid in the adaptors having the same pre-determined sequence or all possible sequences of the single-stranded portion being represented in the adaptors, and wherein each oligonucleotide sequence comprises a first sequence, a second sequence attached to the first sequence and a third sequence attached to the second sequence, in which the first sequence is complementary to the sequence of the primer portion of the adaptor, the second sequence is the same sequence as the single-stranded portion of the adaptors or all possible second sequences of the same length as the single-stranded portion of the adaptors are represented within the set of oligonucleotides, and the third sequence comprises a pre-determined recognition sequence.
Specification