Abstract:
The invention provides methods and kits for ordering sequence information derived from one or more target polynucleotides. In one aspect, one or more tiers or levels of fragmentation and aliquoting are generated, after which sequence information is obtained from fragments in a final level or tier. Each fragment in such final tier is from a particular aliquot, which, in turn, is from a particular aliquot of a prior tier, and so on. For every fragment of an aliquot in the final tier, the aliquots from which it was derived at every prior tier is known, or can be discerned. Thus, identical sequences from overlapping fragments from different aliquots can be distinguished and grouped as being derived from the same or different fragments from prior tiers. When the fragments in the final tier are sequenced, overlapping sequence regions of fragments in different aliquots are used to register the fragments so that non-overlapping regions are ordered. In one aspect, this process is carried out in a hierarchical fashion until the one or more target polynucleotides are characterized, e.g. by their nucleic acid sequences, or by an ordering of sequence segments, or by an ordering of single nucleotide polymorphisms (SNPs), or the like.
Abstract:
Methods of detection of biomolecules are described, including methods of amplification of analyte target species and target reporters by analyte-triggered action of an enzyme such a nuclease, polymerase, and the like. Amplified target species (e.g., amplicons and reporters) are detectable by several embodiments of nanoelectronic sensors having aspects of the invention, and by alternative convention biomolecule detection methods.
Abstract:
The present invention provides novel binding pair compositions of defined and limited stability comprising nucleic acid detection markers useful for the homogeneous, sensitive detection of analytes. Also provided are methods for the sensitive homogeneous detection of analytes, particularly analytes of clinical relevance. Kits for preparing binding pairs of the invention and for performing the methods of the invention are also provided.
Abstract:
The present disclosure provides methods and compositions to detect a specific nucleotide at a selected position of a polynucleotide target sequence.
Abstract:
A method of identifying at least one characteristic of a target molecule comprises the steps of: (i) converting the at least one characteristic into a signal polynucleotide; and (ii) identifying the signal polynucleotide sequence, thereby identifying the at least one characteristic of the target molecule wherein each signal polynucleotide comprises at least one control sequence that defines a characteristic of the signal polynucleotide, and wherein identification of the control sequence confirms whether the signal polynucleotide sequence has been identified correctly, and, optionally, if the identification is not correct, provides the necessary information to determine what the correct signal polynucleotide sequence should be.
Abstract:
The present invention relates generally to the field of investigational bioinformatics and more particularly to secondary structure defining databases. The present invention further relates to methods for interrogating a database as a source of molecular masses of known bioagents for comparing against the molecular mass of an unknown or selected bioagent to determine either the identity of the selected bioagent, and/or to determine the origin of the selected bioagent. The identification of the bioagent is important for determining a proper course of treatment and/or irradication of the bioagent in such cases as biological warfare. Furthermore, the determination of the geographic origin of a selected bioagent will facilitate the identification of potential criminal identity.
Abstract:
The invention relates to a method for the detection of target nucleic acid sequences based on ligation of a first and a second probe that are hybridized adjacent on a target nucleic acid sequence, removal of any unligated probes, preferably by exonuclease treatment, amplification of a portion of the second probe that does not contain the target specific section to provide amplicons and detection of said amplicons. The second probe comprises a second target binding section, one or two primer binding sequences and an identifier. The first probe preferably does not comprise a primer binding sequence, preferably consists of a first target binding section and is preferably exonuclease resistant.
Abstract:
Provided herein are multiple antigen detection (MAD) assays and reagents for performing such assays. MAD assay embodiments are useful for identifying proximal antigens in a sample ( e.g ., antigens existing in a complex), and are performed by contacting a sample with two or more hybrids, where each hybrid comprises a nucleic acid and a binding partner that specifically binds to an antigen. In these embodiments, the hybrid nucleic acids hybridize to one another when the hybrids bind to proximal antigens, and the hybridization product then is detected, often by a polymerase chain reaction (PCR) process or a nucleic acid binding agent comprising a detectable label MAD assays and reagents are applicable to antigen detection in situ, chromatin immunoprecipitation and genomic sequencing, detection of proximal intramolecular regions in an antigen, detecting antigen multimerization, diagnostics and therapeutics. Also provided are kits for conducting MAD applications.
Abstract:
A molecular identification marker for biological samples taken, for example, at a crime scene to confirm the chain of custody and identity of the biological samples at the time of analysis in a laboratory and method of use. The molecular identification marker also acts as an indicator of cross-contamination between marked samples or between reference and unknown biological samples. One embodiment of the molecular identification marker is a segment of DNA with at least one mutagenic primer site configured to produce a unique variant after mutagenic PCR, a segment configured to amplify for a selected forensic locus; and a segment configured for use with a probe to quantify the molecular identification marker.