摘要:
An apparatus for performing a polymerase chain reaction may have an assembly, a heated cover, and a computer. The assembly is capable of cycling samples through a series of temperature excursions and the computer controls the process of cycling the samples through the series of temperature excursions. The assembly includes: a sample block that is configured to receive a plurality of sample vials, a plurality of Peltier thermal electric devices, a heat sink, and a memory device that stores data related to the assembly.
摘要:
Buffer compositions with or without sieving formulations are useful when used in connection with a capillary electrophoresis system as shown in Figure 1 . The buffer composition can include Bis-Tris, TAPS and/or TAPSO and optionally a chelating agent such as EDTA. Methods of separating samples containing DNA or RNA with the capillary electrophoresis system are also described.
摘要:
The invention provides an apparatus comprising an assembly including a sample block configured to receive a plurality of vials arranged in a microtiter tray and a cover for applying a predetermined temperature to upper portions of a plurality of vials received in the sample block. The cover comprises a platen, vertically and horizontally displaceable in relationship to the sample block, a skirt covering the platen, the skirt being configured for mating with a perimeter of the microtiter tray and a heater capable of maintaining the platen at the predetermined temperature.
摘要:
This invention relates to nucleotide polymorphisms in the human Apo(a) gene and to the use of Apo(a) nucleotide polymorphisms in identifying whether a human subject will respond or not to treatment with acetylsalicylic acid.
摘要:
A sample plate structure is provided including a retainer plate having a central opening, a sample insert plate which fits into the opening, an optional pressure plate and a handle. The handle applies pressure to the sample insert plate to retain it within the retainer plate. The sample insert plate is provided with a peripheral configuration, which assures that the sample insert is properly oriented within the sample plate support structure and is held flat. While the sample insert plate can be a consumable, the remaining portion of the apparatus can be reused.
摘要:
A method for calibrating a removable assembly for cycling samples through a series of temperature excursions is disclosed. The removable assembly is attached to an instrument and comprises a sample block for receiving vials, a plurality of thermoelectric devices, a heat sink, a clamping mechanism positioned so as to clamp the thermoelectric devices between the sample block and the heatsink, and a memory device capable of storing data related to the removable assembly. The method comprises the steps of: applying power to the thermoelectric devices, causing the removable assembly to cycle through a desired series of temperature excursions, measuring the actual temperature excursions, comparing the actual temperature excursions with the desired temperature excursions, calibrating the removable assembly by adjusting the power applied to the thermoelectric devices so that the actual temperature excursions match the desired temperature excursions and recording the adjusted power in the memory device for further utilization in obtaining the desired series of temperature excursions, to form a calibrated removable assembly, removing the calibrated removable assembly from the instrument, and attaching the removable assembly to a different instrument.
摘要:
The present invention discloses multiple enzyme assays which measure the activity of at least one endogenous enzyme in a single aliquot and a method of measuring the activity of multiple enzymes in an aliquot of a sample extract, wherein at least one of the enzymes is an endogenous enzyme. In one embodiment of the invention the activity of a first enzyme is quantified by measuring the light signal produced by degradation of a first enzyme substrate by the first enzyme and the activity of the second enzyme is quantified by measuring the light signal produced by the degradation of a second substrate. In the method of the present invention, both quantifications are performed on the same aliquot of sample extract. Different embodiments of the present invention provide for the detection of more than one endogenous enzyme and for the detection of at least one reporter enzyme and at least one endogenous enzyme. The present invention also discloses kits for detecting the activity of multiple enzymes.
摘要:
Provided are nucleotide-dye conjugates and related compounds in which a dye is linked to a nucleobase directly or indirectly by an anionic linker. The anionic character of the linker is provided by one or more anionic moieties which are present in the linker, such as phosphate, phosphonate, sulfonate, and carboxylate groups. When the dye is a provided as a donor/acceptor dye pair, the anionic linker can be located between the donor and the acceptor, or between the nucleobase and either the donor or acceptor, or both. In one embodiment, conjugates of the invention provide enhanced electrophoretic mobility characteristics to sequencing fragments, e.g., for dideoxy sequencing using labeled terminators.
摘要:
Novel cap analogs which are easily synthesized, resulting in high levels of capping efficiency and transcription and improved translation efficiencies are provided. Such caps are methylated at the N7 position of one or both guanosines of the dinucleotide cap as well as at the 3' position on the ribose ring. Substituent groups on the ribose ring also result in the cap being incorporated in the forward orientation. Also provided are methods useful for preparing capped analogs and using mRNA species containing such analogs are also contemplated herein, as well as kits containing the novel cap analogs.