Described herein are synthetic methods for producing sequence-specific RNA oligonucleotides that eliminate impurities produced in prior art methods. In one aspect, an end-protected capture DNA complementary to a portion of the product RNA is employed. In another aspect, the template DNA is covalently or noncovalently linked to the RNA polymerase, either directly or through the use of a nontemplate DNA. In a third aspect, a flow chamber is employed. All of the methods can be used in combination.

Described herein are synthetic methods for producing sequence-specific RNA oligonucleotides that eliminate impurities produced in prior art methods. In one aspect, an end-protected capture DNA complementary to a portion of the product RNA is employed. In another aspect, the template DNA is covalently or noncovalently linked to the RNA polymerase, either directly or through the use of a nontemplate DNA. In a third aspect, a flow chamber is employed. All of the methods can be used in combination.

The invention is directed to modified oligonucleotide compositions and methods for selectively reducing unwanted nucleic acid contaminants and enriching for desired nucleic acid targets from complex genomic nucleic acid mixtures for sequencing applications. The modified oligonucleotide compositions include one or more modified groups that increase the T.sub.m of the resultant oligonucleotide composition.

The invention is directed to modified oligonucleotide compositions and methods for selectively reducing unwanted nucleic acid contaminants and enriching for desired nucleic acid targets from complex genomic nucleic acid mixtures for sequencing applications. The modified oligonucleotide compositions include one or more modified groups that increase the T.sub.m of the resultant oligonucleotide composition.

Disclosed herein, interalia, are compounds, compositions, and methods of using the same for the sequencing of a nucleic acid.

Disclosed herein, interalia, are compounds, compositions, and methods of using the same for the sequencing of a nucleic acid.

In the present invention, it has been confirmed that, when an RNA interference-inducing nucleic acid including at least one 8-oxoguanine (o.sup.8G) in 1st to 9th nucleotides from the 5′-end of at least one single strand of a double strand of a nucleic acid, and a modified nucleic acid that specifically binds to microRNA and in which at least one guanine (G) from among the 1st to 9th nucleotides from the 5′-end are modified with 8-oxoguanine (o.sup.8G), are produced and administered to cells or mice, various pathophysiological phenomena are induced.

In addition, the positions where G>T modifications occur have been identified in cDNA produced through the reverse transcription of microRNA in which guanine (G) is oxidatively modified with 8-oxoguanine (o.sup.8G) by oxidative stress in a seed region of microRNA, to confirm the positions where oxidative modification to 8-oxoguanine has occurred.

In the present invention, it has been confirmed that, when an RNA interference-inducing nucleic acid including at least one 8-oxoguanine (o.sup.8G) in 1st to 9th nucleotides from the 5′-end of at least one single strand of a double strand of a nucleic acid, and a modified nucleic acid that specifically binds to microRNA and in which at least one guanine (G) from among the 1st to 9th nucleotides from the 5′-end are modified with 8-oxoguanine (o.sup.8G), are produced and administered to cells or mice, various pathophysiological phenomena are induced.

In addition, the positions where G>T modifications occur have been identified in cDNA produced through the reverse transcription of microRNA in which guanine (G) is oxidatively modified with 8-oxoguanine (o.sup.8G) by oxidative stress in a seed region of microRNA, to confirm the positions where oxidative modification to 8-oxoguanine has occurred.

The present invention provides for stable nucleotide reagents used for nucleic acid amplification by PCR and RT-PCR (Reverse Transcriptase-PCR) that comprises modified nucleoside polyphosphates. The present invention also provides for methods for using the modified nucleoside polyphosphates for detecting the presence or absence of a target nucleic acid sequence in a sample in an amplification reaction.

The present invention provides for stable nucleotide reagents used for nucleic acid amplification by PCR and RT-PCR (Reverse Transcriptase-PCR) that comprises modified nucleoside polyphosphates. The present invention also provides for methods for using the modified nucleoside polyphosphates for detecting the presence or absence of a target nucleic acid sequence in a sample in an amplification reaction.