摘要:
The invention provides a method of separating proteins and peptides of a sample comprising contacting the sample with a Pd coordination compound. The Pd coordination compound binds to sulfur and/or nitrogen groups and thus is useful for purifying biomolecules comprising cysteine, methionine, histidine amino acids or derivatized amino acids/residues comprising sulfur or nitrogen groups which bind to coordination sites on the Pd coordination compounds. The invention also relates to methods, systems and kits for using the Pd coordination compound.
摘要:
Serial derivatization by chemical reactions of analytes for mass spectrometry is disclosed. The derivatizations enhance the use of MS techniques for analyzing protein samples, particularly when the sequence of a polypeptide is determined by tandem MS/MS. Accurate mass analysis techniques are described for use in sequencing polypeptides, together with the use of sequencing data in protein analysis.
摘要:
Apparatus for preparing a biological sample for PCR analysis has an inlet (4) for receiving the sample (15) and a sieve (13) through which the sample is forced by screwing down an inlet cap (16). A lysis solution between two rupturable seals (11 and 12) is effective to disrupt the cells of the sample and release nucleic acid. The apparatus is mounted releasably on a PCR machine (2) having a motor (2′) releasably coupled with a drive mechanism (3, 36,40) in the apparatus to effect a rotary and a vertical up and down movement of its components (30, 31, 32, 42). The apparatus has a transparent cuvette (5) and a needle (71) extending to the lower end of the cuvette, by which the prepared sample is dispensed to the cuvette for PCR analysis.
摘要:
Methods for the separation of phosphorus-containing biological materials from a sample mixture are provided. The methods use a solid support comprising a Ti(IV) metal-coated sorbent matrix. Methods using the support as a chromatographic column for separation are also provided. The present disclosure also provides methods for making a Ti(IV) metal-coated sorbent.
摘要:
Apparatus and methods are disclosed for concentrating one or more components in a fluid effluent, which comprises fractions comprising separated components of interest. The fluid effluent is passed through a concentration device comprising a hollow element comprising a wall at least a portion of which is porous wherein the hollow element is disposed in the interior of a hollow liner. Fluid effluent molecules are permitted to permeate through the wall of the hollow element so that component molecules are concentrated in remaining effluent, which exits the concentration device. The component or components may then be detected.
摘要:
Apparatus and methods are disclosed for digesting a biopolymer in a medium. The medium is disposed adjacent a wall of a hollow element wherein at least a portion of the wall is porous. The medium is then exposed to digestion conditions to cleave the biopolymer into fragments. The fragments are permitted to permeate through the wall of the hollow element. In some embodiments a surface of a wall of the hollow element comprises a digestion agent. In some embodiments the hollow element is disposed within a hollow liner. For analysis and identification purposes, the fragments may be separated and/or detected.
摘要:
This invention relates to methods and kits for collecting different biopolymers from a single sample, such as RNA and genomic DNA. The methods and kits can be used for generating targets for array-based assays such as gene expression assays and comparative genome hybridization assays which can be performed in parallel on the same or different arrays.
摘要:
Methods for expanding conditions of use of a DNase I-like enzyme are disclosed as are compositions and kits comprising a DNAse I-like enzyme. Methods and kits for isolating RNA are also disclosed.
摘要:
Devices and methods for isolating nucleic acid are disclosed herein. In particular, the isolation of total cellular RNA is discussed. Additionally, devices and methods for reducing genomic DNA in a biological sample without introducing harmful contaminants, and without significantly increasing the time required for the overall procedure being performed on a sample are presented.
摘要:
A method of analyzing a polynucleotide using matrix assisted laser desorption/ionization mass spectrometry (MALDI-MS) is described. The method includes obtaining the polynucleotide bound to a substrate via a linker moiety having a triaryl methyl linker group. The polynucleotide bound to the substrate is then contacted with a matrix material and analyzed by MALDI-MS. During the MALDI-MS analysis, laser radiation is directed at the matrix material, thereby exciting the matrix material and causing cleavage of the linker moiety. Ions generated as a result of this excitation and cleavage process are then analyzed to provide information about the polynucleotide.