摘要:
The present disclosure concerns a Protein Quantification Reporter (PQR) linker which is capable of being cleaved during the translation of a messenger RNA to quantify a protein of interest. The PQR linker can encode a peptide of SEQ ID NO: 23 and have the nucleic acid sequence of SEQ ID NO: 25. The PQR linker is located in a nucleic acid molecule encoding a poly-protein between a reporter protein and the protein of interest. While the messenger RNA encoding the poly-protein is being translated, the presence of the PQR linker causes cleavage of the poly-protein and consequently the release at a stoichiometric ratio of the reporter protein and the protein of interest. The signal associated with the cleaved reporter protein can be measured to estimate or quantify the protein of interest.
摘要:
Methods of detecting, probing, mapping and directed sequencing of target nucleic acids are provided using a guide RNA and a Cas9 protein. Methods for detecting the binding of the guide RNA/Cas9 complex to a target nucleic acid where the guide RNA includes a 3' tail sequence that can hybridize to a probe are provided. Methods for detecting the binding of the guide RNA/Cas9 complex to a target nucleic acid where the complex is physically detected are provided.
摘要:
Methods for detecting the amplifications of sequences in the BRCA1 locus, which sequences have ends consisting of or are framed with sequence stretches present at least twice in the BRCA1 locus, and which amplification results in at least two or at least three, especially three, tandem copies of the amplified sequence; methods for determining a predisposition to diseases or disorders associated with these amplifications, including predisposition to ovarian cancer or breast cancer and methods for detecting amplifications with similar features in other loci and/or for predicting breakpoints of such amplifications.
摘要:
The present invention generally relates to imaging single molecules, and methods related to the imaging. The method comprises the steps of: a) exposing a test sample to a probe comprising a first portion that specifically binds to a target molecule and a second portion that is detectable as the result of one or more chemical groups that interact with light, wherein the probe binds to a target molecule to provide a complex; b) exposing the complex to one or more wavelengths of light; c) detecting a result from the interaction of one or more wavelengths of light with the one or more chemical groups to provide an image of one or more single molecules. The image possesses a resolution better than 450 nm over a view field area of at least 1 x 10 5 μm 2 , and is obtained in a single detection step without variation of any detection settings.
摘要:
A method for detecting a nucleic acid molecule comprises: a step for preparing a sample solution which contains a nucleic acid probe which is specifically hybridizable with the nucleic acid molecule to be analyzed, and a biosample; a step for associating the nucleic acid molecule with the nucleic acid probe in the sample solution that has been prepared in the preparing step; and a step for, after the associating step, calculating, by the scanning molecule counting method, the number of molecules of the associated bodies including the nucleic acid probe in the sample solution that has been prepared in the preparing step. This method for detecting a nucleic acid molecule further comprises: a step for removing proteins from the sample solution before the calculating step, or a step for removing proteins from the biosample before the preparing step.
摘要:
The present invention relates to the detection of RNA in a sample of cells. More particularly, the present invention relates to the localized detection of RNA in situ . The method relies on the conversion of RNA to complementary DNA prior to the targeting of the cDNA with a padlock probe(s). The hybridization of the padlock probe(s) relies on the nucleotide sequence of the cDNA which is derived from the corresponding nucleotide sequence of the target RNA. Rolling circle amplification of the subsequently circularized padlock probe produces a rolling circle product which may be detected. Advantageously, this allows the RNA to be detected in situ .
摘要:
A microfluidic device and method for enzymatic processing of ultra-long macromolecules is disclosed. The device comprises a reaction chamber with a first manifold, a second manifold, and a plurality of reaction channels, each reaction channel extending from the first manifold to the second manifold. The device further comprises first inlet and outlet channels for filling the reaction channels via the manifolds with one or more macromolecule containers suspended in a first carrier fluid, wherein the first inlet and outlet channels are configured such that a flow established from the first set of inlets to the first set of outlets is guided through the reaction channels, and second inlet and outlet channels for feeding an enzymatic reagent to the reaction chamber essentially without displacing the macromolecule containers trapped in the reaction channels, wherein the second set of inlets and outlets are configured such that a flow established from the second inlet to the second outlet is guided through at least one of the manifolds and bypasses the reaction channels.
摘要:
Das Verfahren zur mikroskopischen Ortsbestimmung eines ausgewählten intrazellulären, nativen Genomabschnitts mit bekannter Nukleotidsequenz in situ ist durch die Art und Reihenfolge der folgenden Maßnahmen gekennzeichnet: (1.) Die Target-DNA wird anhand von Genomdatenbanken hinsichtlich Teilsequenzen analysiert, die ein einmaliges Muster innerhalb des Genoms darstellen. (2) Es werden einzelsträngige Sondensequenzen bereitgestellt, die mit diesen Teilsequenzen übereinstimmen oder komplementär dazu sind, und die über eine Watson-Crick-Bindung zur Hybridisierung an die Einzelstränge dieser Teilsequenzen geeignet sind. (3.) Die Sondensequenzen werden mit Markermolekülen gekoppelt sind, wobei alle Einheiten aus Sondensequenz und Markermolekül(en) das gleiche Bindungsverhalten oder den gleichen Schmelzpunkt mit dem zu ihr komplementären Einzelstrang der Target-DNA aufweisen. (4.) Die Sondensequenzen werden in die Zelle eingebracht und mit der Target-DNA zusammengebracht, so daß sie mit den entsprechenden, temporär als zwei Einzelstränge vorliegenden Teilsequenzen der Target-DNA hybridisieren. (5.) Die emittierten Markersignale werden detektiert und (6.) anhand des Vorhandenseins und/oder der Intensität und/oder des gleichzeitigen Auftretens von verschiedenen Markersignalen wird der Ort der Target-DNA auf dem Genom identifiziert.