Abstract: Disclosed herein is a method of identifying an L-RNA aptamer specific for a target nucleic acid. According to some embodiments of the present disclosure, the method comprises, in vitro transcribing the DNAs of the DNA library into D-RNAs, followed by identifying target-specific D-RNAs via negative and positive selections, and then producing the L-RNA aptamer based on the identified D-RNA. Also disclosed herein are two aptamers identified by the present method. According to some embodiments of the present disclosure, the two aptamers respectively comprise the nucleotide sequences of SEQ ID NOs: 1 and 2.

Abstract: A method of cyclizing an L-RNA aptamer by modifying the aptamer with a 3? azide and a 5? alkyne group and using click chemistry reaction-based method. The cyclized L-RNA aptamers have improved binding properties and favour more in vitro/cell applications. Also disclosed is an L-oligonucleotide aptamer having linked ends.

Abstract: A method of producing an aptamer selectively binding a non-canonical structure of a target nucleic acid molecule includes the steps of: incubating a plurality of nucleic acid sequences with an enantiomer of the non-canonical structure under suitable conditions to obtain one or more candidate nucleic acid sequences binding to the enantiomer of the non-canonical structure, purifying and amplifying the one or more candidate nucleic acid sequences; repeating said incubating, purifying and amplifying steps for a predetermined number of cycles under different conditions; and producing an enantiomer for selected amplified candidate nucleic acid sequence to obtain the aptamer capable of selectively binding the non-canonical structure of the target nucleic acid molecule. An aptamer selectively binding to a non-canonical structure of a nucleic acid molecule or its enantiomer, the aptamer comprising a sequence of SEQ ID NO: 11; as well as uses of the aptamer or its enantiomer.

Abstract: A method of producing a cDNA from a sample of nucleic acids includes the steps of: generating a dephosphorylated RNA from the sample; ligating the dephosphorylated RNA with a first adapter in the presence of a crowding agent to produce a ligated product; removing the excess first adapter by adding at least two enzymes; and performing reverse transcription in a lithium-containing buffer to produce the cDNA. A method of preparing a DNA library and a kit for such preparation are also disclosed.

Abstract: A method of producing an aptamer selectively binding a non-canonical structure of a target nucleic acid molecule includes the steps of: incubating a plurality of nucleic acid sequences with an enantiomer of the non-canonical structure under suitable conditions to obtain one or more candidate nucleic acid sequences binding to the enantiomer of the non-canonical structure, purifying and amplifying the one or more candidate nucleic acid sequences; repeating said incubating, purifying and amplifying steps for a predetermined number of cycles under different conditions; and producing an enantiomer for selected amplified candidate nucleic acid sequence to obtain the aptamer capable of selectively binding the non-canonical structure of the target nucleic acid molecule. An aptamer selectively binding to a non-canonical structure of a nucleic acid molecule or its enantiomer, the aptamer comprising a sequence of SEQ ID NO: 11; as well as uses of the aptamer or its enantiomer.

Abstract: The invention provides compositions and methods for ligating single stranded nucleic acids wherein the ligation is based on fast, efficient, and low-sequence bias hybridization of an acceptor molecule with a donor molecule. In one embodiment, the structure of the donor molecule comprises a stem-loop intramolecular nucleotide base pairing (i.e., hairpin) and a 3?-overhang region such that the overhang is able to hybridize to nucleotides present in the 3? end of the acceptor molecule.

Abstract: A method of producing a cDNA from a sample of nucleic acids includes the steps of: generating a dephosphorylated RNA from the sample; ligating the dephosphorylated RNA with a first adapter in the presence of a crowding agent to produce a ligated product; removing the excess first adapter by adding at least two enzymes; and performing reverse transcription in a lithium-containing buffer to produce the cDNA. A method of preparing a DNA library and a kit for such preparation are also disclosed.

Abstract: The invention provides compositions and methods for ligating single stranded nucleic acids wherein the ligation is based on fast, efficient, and low-sequence bias hybridization of an acceptor molecule with a donor molecule. In one embodiment, the structure of the donor molecule comprises a stem-loop intramolecular nucleotide base pairing (i.e., hairpin) and a 3?-overhang region such that the overhang is able to hybridize to nucleotides present in the 3? end of the acceptor molecule.

Abstract: The invention provides compositions and methods for ligating single stranded nucleic acids wherein the ligation is based on fast, efficient, and low-sequence bias hybridization of an acceptor molecule with a donor molecule. In one embodiment, the structure of the donor molecule comprises a stem-loop intramolecular nucleotide base pairing (i.e., hairpin) and a 3?-overhang region such that the overhang is able to hybridize to nucleotides present in the 3? end of the acceptor molecule.

Abstract: The invention provides compositions and methods for ligating single stranded nucleic acids wherein the ligation is based on fast, efficient, and low-sequence bias hybridization of an acceptor molecule with a donor molecule. In one embodiment, the structure of the donor molecule comprises a stem-loop intramolecular nucleotide base pairing (i.e., hairpin) and a 3?-overhang region such that the overhang is able to hybridize to nucleotides present in the 3? end of the acceptor molecule.

Abstract: Methods to dope transistors with equal or similar dopant concentration are described. In a first alternative, a slow dose per pulse ramp during plasma-assisted doping is proposed. This method results in a thinner surface deposited layer resulting in equal dopant concentration throughout the area. In a second alternative, transistors are placed away from the mask edge in order to achieve equal dopant concentration.