Abstract:
Disclosed herein are surface activated, organic polymers useful for biopolymer synthesis. Most preferably, aminated biaxially oriented polypropylene is used for the synthesis of oligonucleotides thereto, and these devices are most preferably utilized for genetic analysis of patient samples.
Abstract:
The gene for Streptococcus pyogenes DNase B has been cloned and vectors incorporating the cloned DNA have been used to transform Escherichia coli, allowing production of the DNase in E. coli. The enzyme can be produced with a leader peptide at its amino terminus. Method for the purification of naturally occurring S. pyogenes DNase B enzyme is also provided. The DNase B enzyme produced, either by purification of naturally occurring enzyme or by recombinant DNA techniques, can be used to generate antibodies and can also be used in immunochemical assays to detect the presence of anti-DNase B antibodies in serum as a marker of infection by S. pyogenes.
Abstract:
A sample segment (10) including a body and wells (14) formed therein, selected wells (14b, 14f) including a flat exterior surface (56) surrounding a tapered end (64). The sample segment (10) may retain selected reagents (80), and a sealing cover (90) is held by ribs (74, 76), stretched and pressed against raised bosses (70) formed around the well openings (44) to provide a sure seal. The bosses (70) are discontinuous between adjacent wells (14). Selected wells may contain a free mixing element (82) for enhanced mixing. The segment (10) is uniquely adapted for automated handling and processing.
Abstract:
A centrifuge rotor lid (44) assembly which includes a handle (64) which allows convenient handling of a centrifuge rotor (30) and provides a means of releasing the lid (44) from the rotor (30) after centrifugation. In the described embodiment, the lid (44) is provided with a lid knob (48) and a spindle knob (50) in a coaxial sliding arrangement. The lid knob (48) is used to tighten the lid (44) on the rotor body (30) and the spindle knob (50) is used to tighten the rotor (30) to the centrifuge drive spindle (36). The upper end of the inner knob (50) is provided with a handle (64) which extends perpendicular to the axis of the knob. This handle (64) is used for lifting the rotor (30) after the spindle knob (50) has been unscrewed from the spindle (36) and for unscrewing the lid knob (48). The lower end of the spindle knob (50) has a pin (66) which cooperatively engages the lower end of the lid knob (48) when the spindle knob (50) is lifted from the rotor (30) and is turned in a direction to unscrew the lid knob (48). The handle provides the necessary mechanical advantage for a person to exert sufficient torque to unscrew the lid knob (48) without the use of external tools.
Abstract:
A method for making a valproic acid derivative comprising a functionalized spacer arm attached to a (delta) carbon atom of a valproic acid molecule is disclosed. The method proceeds by attaching a spacer arm joined to an inorganic moiety to a valproic acid precursor to make an alkylated compound, derivatizing the alkylated compound in a liquid medium to make the valproic acid derivative, and then separating the valproic acid derivative from the liquid medium. The valproic acid derivative can be used to make an immunoreactive valproic acid conjugate.
Abstract:
A solid-phase nucleotide synthesis intermediate useful for chemical synthesis of oligodeoxyribonucleotides and oligoribonucleotides comprises: (1) a particulate support comprising a porous polymer whose backbone comprises optionally substituted acrylate or methacrylate moieties; (2) a nucleoside; and (3) a linker having a first and a second end, the first end being covalently attached to the particulate support and the second end being covalently attached to the nucleoside, the linker spacing the nucleoside at least 3 atoms away from the polymer. The linker can comprise at least one optionally substituted aliphatic diamine. Alternatively, the linker can comprise a polyethylene glycol moiety. Preferably, the porous polymer is a methacrylate-vinylidene polymer. The solid-phase support thus produced can be used for oligodeoxyribonucleotide synthesis by either the phosphite-triester or the phosphotriester processes.
Abstract:
An initial rate photometric immunoassay method useful for detecting and quantifying analytes in various physiological fluids is disclosed. The method is carried out by combining in a liquid medium an undiluted sample of analyte-containing physiological fluid, such as serum, and an excess of an anti-analyte antibody. A substantially constant initial rate of increase of the liquid medium'sturbidity, due to the resulting immunoprecipitation reaction, is measured in real time and compared to a calibration curve prepared from known analyte concentrations to detect and quantify the analyte. Detection and quantification of numerous analytes including haptens, drugs and proteins, in a wide variety of physiological fluids can be rapidly carried out by the present method.
Abstract:
Disclosed are reagents of methods for cleaving and deprotecting insolubilized and protected synthetic oligonucleotides. In a particularly preferred embodiment, the reagent comprises methylamine and t-butylamine.
Abstract:
Disclosed herein is a methodology for analyzing isoenzymes using capillary zone electrophoresis ('CZE') techniques. Briefly, an isoenzyme-containing sample and a substrate capable of being catalyzed by said isoenzyme into a reaction product are introduced into a capillary column comprising a buffer. Most preferably, the buffer contains the substrate prior to introduction of the sample into such substrate-buffer. CZE separation techniques are applied to the column such that the isoenzymes are separated from each other into discrete zones. The separation techniques are terminated such that product is rapidly generated by the catalytic conversion of substrate by the isoenzymes, and accumulated, within each discrete zone, followed by detection of product. Information regarding the relative distribution of the isoenzymes can be derived from the relative distribution of the product.