This application relates to molecular biology, and more specifically to a method which uses the molecular recognition between a target molecule ligand and an aptamer, magnetic separation and MS qualitative and quantitative analysis to enable the association between the detection of multi molecules and information of multiple functional groups, and effectively determine the correlation between molecules and functional groups of the body or tissue. This application can easily purify the target molecules by magnetic separation and can effectively obtain the target molecule group based on the high specificity and affinity of the aptamer. In addition, based on the MS detection, this application can effectively perform the qualification and quantification of the multi molecules, achieving the secondary molecular detection and improving the detection accuracy. The simultaneous qualification and quantification of multi molecules can not only accurately reflect the relationship among molecules, but also reveal the interrelationship among body functions, playing a significant role in the proteomics and genomics research and clinical molecular detection.

The present invention provides allergen detection molecules and devices useful in on-site and rapid detection of allergens, including food allergens.

The present invention relates to an aptamer comprising a nucleotide sequence SEQ ID NO: 1 or a fragment thereof of at least 20 contiguous nucleotides of the nucleotide sequence SEQ ID NO: 2, wherein the aptamer comprises a polyethylene glycol (PEG) moiety conjugated to the 5′ or the 3′ end. The invention further relates to a composition comprising the aptamer, and the use of the aptamer in the diagnosis and treatment of cancer, particularly hormone refractory prostate tumours.

The present disclosure relates to methods for identifying aptamers against allergen proteins and signaling polynucleotides (SPNs) for allergen detection. The screening method of the present disclosure combines several positive SELEX selections, and on-chip positive and counter selections to identify aptamer sequences that are preferentially bind to target proteins when competing with short complementary sequences.

Disclosed herein are methods of reverse transcribing a polynucleotide comprising an unnatural ribonucleotide comprising reverse transcribing the polynucleotide with a reverse transcriptase in the presence of an unnatural dNTP comprising an unnatural nucleobase, wherein the reverse transcriptase polymerizes cDNA into which the unnatural NTP is incorporated. In some embodiments, the polynucleotide is present at a concentration less than or equal to about 500 nM and/or the polynucleotide is a tRNA, mRNA, RNA aptamer, or a member of a plurality of RNA aptamer candidates.

The disclosure is directed to methods and compositions for screening a library of aptamers for aptamers having a binding affinity to a target molecule. Specifically, non-natural nucleotides can be introduced onto aptamers immobilized on the surface of beads. The non-natural nucleotides can then be subsequently chemically modified to include additional binding agents. For example, copper-catalyzed azide-alkyne cycloaddition (CuAAC) reactions can be used to introduce a wide range of binding agents onto non-natural nucleotides on beads.

The disclosure is directed to methods and compositions for screening a library of aptamers for aptamers having a binding affinity to a target molecule. The methods and compositions described herein utilize a throughput approach that is able to simultaneously measure binding affinity and link the binding affinity to the identity (e.g., sequence) of the aptamer.

The disclosure is directed to methods and compositions for screening a library of aptamers for aptamers having a binding affinity to a target molecule. The methods and compositions described herein utilize a throughput approach that is able to simultaneously measure binding affinity and link the binding affinity to the identity (e.g., sequence) of the aptamer.

An encrypted rolling code, a plurality of differing data bit order patterns, and a plurality of differing data inversion patterns are provided. One then selects a particular one of each of these patterns and uses those selected patterns as transmission characteristics when transmitting at least part of the encrypted rolling code.

The present disclosure describes improved SELEX methods for producing aptamers that are capable of binding to target molecules and improved photoSELEX methods for producing photoreactive aptamers that are capable of both binding and covalently crosslinking to target molecules. Specifically, the present disclosure describes methods for producing aptamers and photoaptamers having slower dissociation rate constants than are obtained using prior SELEX and photoSELEX methods. The disclosure further describes aptamers and photoaptamers having slower dissociation rate constants than those obtained using prior methods. In addition, the disclosure describes aptamer constructs that include a variety of functionalities, including a cleavable element, a detection element, and a capture or immobilization element.