摘要:
A method of probing a plurality of analyzer molecules distributed about a detection platform is disclosed. The method includes contacting a test sample to the plurality of analyzer molecules, scanning the plurality of analyzer molecules at a rate relating to a carrier frequency signal, and detecting the presence or absence of a biological molecule based at least in part upon the presence or absence of a signal substantially at a sideband of the carrier frequency signal. A molecule detection platform including a substrate and a plurality of targets positioned about the substrate is also disclosed. Specific analyzer molecules adapted to bind a specific analyte are immobilized about a first set of the targets. Nonspecific analyzer molecules are immobilized about a second set of the targets. The targets positioned about the substrate along at least a segment of a scanning pathway alternate between at least one of the first set and at least one of the second set. A method including providing a substrate for supporting biological analyzer molecules the substrate including at least one scanning pathway is also disclosed. The scanning pathway includes a plurality of scanning targets. Specific biological analyzer molecules adapted to detect a specific target analyte are distributed about a first set of the targets which alternate in groups of at least one with a second set of the targets the second set of the targets not including the specific biological analyzer molecules.
摘要:
A method of probing a plurality of analyzer molecules distributed about a detection platform is disclosed. The method includes contacting a test sample to the plurality of analyzer molecules, scanning the plurality of analyzer molecules at a rate relating to a carrier frequency signal, and detecting the presence or absence of a biological molecule based at least in part upon the presence or absence of a signal substantially at a sideband of the carrier frequency signal. A molecule detection platform including a substrate and a plurality of targets positioned about the substrate is also disclosed. Specific analyzer molecules adapted to bind a specific analyte are immobilized about a first set of the targets. Nonspecific analyzer molecules are immobilized about a second set of the targets. The targets positioned about the substrate along at least a segment of a scanning pathway alternate between at least one of the first set and at least one of the second set. A method including providing a substrate for supporting biological analyzer molecules the substrate including at least one scanning pathway is also disclosed. The scanning pathway includes a plurality of scanning targets. Specific biological analyzer molecules adapted to detect a specific target analyte are distributed about a first set of the targets which alternate in groups of at least one with a second set of the targets the second set of the targets not including the specific biological analyzer molecules.
摘要:
A planar array having plurality of biological recognition molecules including at least two types of biological recognition molecules distributed about a substrate is disclosed. A first type of biological recognition molecules is distributed according to a first frequency and a second type of biological recognition molecules is distributed according to a second frequency. Another planar array having a plurality of biological recognition molecules including at least two kinds of biological recognition molecules is disclosed. The recognition molecules are distributed about a substrate with first kind of biological recognition molecules distributed at a first height or depth relative to a surface of the substrate and a second kind of biological recognition molecules distributed at a second height or depth relative to the surface. An apparatus including a surface normal interferometry platform including a scanning pathway and a plurality of analyzer molecules adapted to detect the presence or absence of a plurality of target analytes is also disclosed. The plurality of analyzer molecules are distributed about the scanning pathway according to a multiplexing scheme. A method including multiplexing a plurality of kinds of capture molecules about a detection pathway is further disclosed. The method also includes contacting a biological sample to the array, detecting the presence or absence of binding of the plurality of kinds of capture molecules and a plurality of target analytes using interferometry.
摘要:
A phase contrast quadrature interferometric method and apparatus for determining the presence or absence of a target analyte in a sample. The method includes probing a substrate exposed to the sample with a laser beam. The substrate includes a reflecting surface with a first region having recognition molecules specific to the target analyte and a second region without recognition molecules. The method also includes probing the first and second region, and measuring time dependent intensity on a photodetector at one or both of a pair of quadrature angles of a reflected diffraction signal. The apparatus includes a laser source, a platform for receiving the planar array, an objective lens offset from the platform by approximately a focal length, and a split photodetector means for measuring a first quadrature and a second quadrature in a signal resulting from reflection of the laser beam.
摘要:
A device for identifying analytes in a biological sample, including a substrate configured to bind the analyte and a detection system to determine the presence or absence of the analyte in the biological sample.
摘要:
A device for identifying analytes in a biological sample, including a substrate having a surface lying substantially in a first plane, a plurality of targets, each having a wall lying substantially in a second plane offset from the first plane, and a receptor coating applied to one of the surface and the target walls for binding analytes present in the biological sample when the biological sample is applied to the substrate. A laser beam is sequentially directed onto each of the plurality of target, the laser being positioned relative to the substrate such that when the beam is directed onto a target, a first half of the beam is reflected back to the laser from the wall of the target and a second half of the beam is reflected back to the laser from the surface of the substrate adjacent the target. The laser combines the first and second reflected halves to produce a diffraction signal that has a first value when an analyte is not bound to the receptor coating associated with a target and a second value when an analyte is bound to the receptor coating associated with the target, thereby indicating the presence of the analyte.
摘要:
An apparatus for assessing topology of a surface of a target. The apparatus includes an optical source for generating a probe laser beam. The apparatus also includes means for scanning the probe laser beam across at least a portion of the surface of the target. The apparatus further includes a beamsplitter for redirecting a return signal toward means for detecting the return signal in a substantially quadrature condition, the return signal resulting from reflection of the probe laser beam off the surface of the target. A quadrature interferometric method for determining the presence or absence of a target analyte in a sample. The method comprises generating a laser probe beam having a wavelength λ and a waist wo to probe at least a portion of a substrate having a reflecting surface that has been exposed to the sample. The reflecting surface includes at least a first region having a layer of recognition molecules specific to the target analyte and a second region that does not include a layer of recognition molecules specific to the target analyte. The method also comprises scanning the first region and the second region while the substrate is maintained in a substantially fixed position. The method further comprises measuring a time dependent intensity of a reflected diffraction signal of the probe beam while scanning the probe beam across the first region and the second region.
摘要:
An apparatus for assessing topology of a surface of a target including an optical source for generating a probe laser beam. The apparatus also includes a means for scanning the probe laser beam across at least a portion of the surface of the target and a beamsplitter for redirecting a return signal toward the means for detecting the return signal in a substantially quadrature condition. A quadrature interferometric method for determining the presence or absence of a target analyte in a sample comprising a laser probe beam having a wavelength λ and a waist wo to probe at least a portion of a substrate having a reflecting surface that includes at least a first region having a layer of recognition molecules specific to the target analyte and a second region that does not include a layer of recognition molecules specific to the target analyte.
摘要:
A diagnostic method for determining the absence or presence of a disease is provided. The method generally includes assaying the amount and/or types of oxidized peptides in a sample from a subject, and comparing these to the amount and types of reference oxidized polypeptides. The method may include the use of stable isotope label, affinity selection, to identify and quantify changes in oxidized peptides or oxidized proteins associated with diseases such as type II diabetes mellitus, breast cancer, and Parkinson's disease, to monitor a patient's response to a therapeutic agent (e.g., an antioxidant), and/or to monitor disease recurrence.
摘要:
A multi-dimensional method for simultaneously analyzing multiple analytes within a sample solution, comprising adding affinity selectors to a sample solution containing analytes to be measured, the affinity selectors having an affinity for one or more of the analytes within the sample solution; allowing immune complexes to form between the affinity selectors and the analytes; partially or totally resolving the formed immune complexes from non-analyte substances within the sample solution; dissociating the resolved immune complexes; separating the analytes and the affinity selectors of the dissociated immune complexes from one another by capturing the analytes through a surface adsorption process; transferring the captured analytes to a detection means; and resolving the analytes with the detection means in accordance with their mass-to-charge ratios.