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Protein Extraction

Protein extraction kits provide a simple, rapid, and reproducible method for preparing total cellular protein extracts from a wide variety of biological samples. The results of these extraction systems generate protein samples that can be applied directly to a variety of applications. High-performance models are designed for efficient recovery of genomic DNA and RNA. These extraction kits are capable of purifying genomic DNA, total RNA, and total protein simultaneously from cultured cells, animal tissues, whole blood, and biological fluids.

Protein extraction kits, ProteoExtract™

Supplier: Merck Millipore (Calbiochem‎)

ProteoExtract® Kits cover the different steps of the proteomics workflow, from protein extraction and abundant protein removal to concentration of protein mixtures and removal of interfering substances, digestion of proteins and selective capturing of phosphopeptides. These kits work in concert with one another to provide protein samples that are directly compatible with downstream analytical applications.

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Master mix, BugBuster®

Supplier: Merck Millipore (Novagen)

BugBuster® master mix combines BugBuster® protein extraction reagent with Benzonase® Nuclease and rLysozyme™ solution in one convenient reagent. It allows for maximum recovery of active soluble protein from both Gram-negative and Gram-positive bacteria. The master mix provides sufficient reagents for protein extraction from 20 g and 100 g cell paste.

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Protein extraction kits, BugBuster® Plus Lysonase™

Supplier: Merck Millipore (Novagen)

BugBuster® Plus Lysonase™ includes BugBuster Protein Extraction Reagent and Lysonase Bioprocessing Reagent, an optimised, ready-to-use blend of rLysozyme™ and Benzonase® Nuclease in a single kit. This powerful combination of two reagents allows maximum recovery of active soluble protein from both Gram-negative and Gram-positive bacteria. The BugBuster® and rLysozyme™ efficiently lyse the bacterial cells while the Benzonase® degrades nucleic acids to facilitate downstream processing. Requires 5 ml BugBuster and 10 µl Lysonase per 1 g cell paste. The kits provide sufficient reagents for protein extraction from 20 g or 100 g cell paste.

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PopCulture® reagent

Supplier: Merck Millipore (Novagen)

PopCulture® Reagent is a detergent-based concentrate that can be added directly to cultures of E. coli to effectively extract proteins without the need for cell harvest. Recombinant proteins can be directly screened in the crude extract, or purified by adding an affinity matrix, washing the matrix-target protein complex to remove spent culture medium and cellular contaminants, and eluting the purified protein from the matrix. The PopCulture protein purification procedure is ideally suited to high-throughput robotic processing of samples for proteomics research or any application that would benefit from the increased speed and convenience.

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Fraction-FOCUS™

Fraction-FOCUS™

Supplier: G-Biosciences

Fraction-FOCUS™ utilises proven technology to fractionate and concentrate all proteomes into multiple fractions; simplifying 2D maps and enhancing detection of low abundant proteins. Fraction-FOCUS™ is fully compatible with all downstream protein identification techniques.

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Thrombin cleavage capture kit, Millipore®

Supplier: Merck Millipore (Novagen)

The thrombin cleavage capture kit is designed for cleavage of fusion proteins followed by convenient and quantitative removal of thrombin protease. The method is based on the use of biotinylated thrombin for digestion and its subsequent removal with streptavidin agarose.

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Protein precipitation and concentration kit, UPPA-PROTEIN-Concentrate™

Protein precipitation and concentration kit, UPPA-PROTEIN-Concentrate™

Supplier: G-Biosciences

UPPA PROTEIN-Concentrate™ Kit uses a proprietary reagent UPPA™ (Universal Protein Precipitation Agent) to quantitatively concentrate dilute protein samples as low as 1 ng/ml. Concentration is not affected by the presence of common laboratory agents, including detergents and chaotropes. After precipitation, the sample is washed to remove salts and other interfering agents; complete recovery of sample is produced.

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Protein concentration kit, OrgoSol-PROTEIN-Concentrate™

Protein concentration kit, OrgoSol-PROTEIN-Concentrate™

Supplier: G-Biosciences

The OrgoSol-PROTEIN-Concentration™ Kit precipitates protein with a proprietary solvent buffer, OrgoSol™. The OrgoSol™ buffer has been specifically developed for efficient precipitation of protein solutions with minimal disruption to the protein structure and therefore maintains the biological activity of most proteins.

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Endoproteinase Glu-C, excision grade, Staphylococcus aureus

Supplier: Merck Millipore (Calbiochem‎)

Native endoproteinase Glu-C from Staphylococcus aureus. Serine protease that specifically hydrolyses peptide bonds at the carboxylic side of glutamic acid and aspartic acid residues. Inhibited by DFP and α2-macroglobulin. Suggested working concentration: 1:20 to 1:100 (protease:protein by weight) for sequence analysis.

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Carrier proteins, Imject™ Maleimide-Activated Blue Carrier™

Supplier: Thermo Fisher Scientific

Imject™ Maleimide-Activated Blue Carrier™ Protein enables conjugation of a sulfhydryl-containing hapten to elicit an immune response and antibody production against the hapten. Blue Carrier™ Protein is a haemocyanin from the Concholepas concholepas mollusc with immunogenic properties similar to keyhole limpet haemocyanin. Blue Carrier™ Protein has a large mass (~8 × 106 Da) and has been successfully used in polyclonal and monoclonal antibody production for
synthetic haptens and peptides.

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Endoproteinase Lys-C, sequencing grade, Lysobacter enzymogenes

Supplier: Merck Millipore (Calbiochem‎)

Native endoproteinase Lys-C from Lysobacter enzymogenes. Serine protease that specifically hydrolyses amide and peptide ester bonds at the carboxylic side of lysine in peptides and proteins. Designed for protein sequencing or sequence verification, analysis of protein structural domains, and cleavage of fusion proteins. Inhibited by aprotinin, DFP, leupeptin, and TLCK. Suggested working concentration: 1:20 to 1:100 (protease: protein by weight) for sequence analysis.

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Protein concentration kit, Column-PROTEIN-Concentrate™

Protein concentration kit, Column-PROTEIN-Concentrate™

Supplier: G-Biosciences

The Column-PROTEIN-Concentrate™ Kit has been specifically developed for concentration of those proteins that cannot be concentrated either by precipitation or other techniques. The kit is based on a proprietary Protein Binding Resin that binds and immobilises any protein in a low salt buffer between pH 2 to 12. The binding capacity is ~0,5 mg protein/ml Protein Binding Resin.

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Cell surface protein isolation and labelling kit, HOOK™

Cell surface protein isolation and labelling kit, HOOK™

Supplier: G-Biosciences

The HOOK™ Cell Surface Protein Isolation Kit uses HOOK™ biotin labelling and purification technology in conjunction with Mammalian Cell PE LB™ Lysis Buffer to conveniently label cell surface proteins and isolate them for further analysis, including Western blotting. The Kit is supplied with all the necessary reagents and buffers for convenience and improved reproducibility. The kit is compatible with a wide variety of mammalian cells and can be used to compare treated and untreated cells and differences between different cell lines.

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Endoproteinase Asp-N, excision grade, Pseudomonas fragi

Supplier: Merck Millipore (Calbiochem‎)

Native endoproteinase Asp-N from Pseudomonas fragi. Designed for protein sequencing or sequence verification, analysis of protein structural domains, and cleavage of fusion proteins. Metalloprotease that specifically hydrolyses proteins at the N-terminal side of aspartic acid and cysteic acid residues. Inhibited by aprotinin, DFP, leupeptin, and TLCK. Suggested working concentration: 1:20 to 1:100 (protease:protein by weight) for sequence analysis.

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Sample Grinding Kit

Sample Grinding Kit

Supplier: Cytiva

Sample grinding kit is ready to use for disrupting small tissue and cell samples for protein extraction.

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Washing solution, Protein-OUT™

Washing solution, Protein-OUT™

Supplier: G-Biosciences

Protein-OUT™ is a washing solution that cleans plastic and glassware used in the proteolytic digestion and peptide isolation for mass spectrometry analysis. The rinsing of plastic and glassware with Protein-OUT™ will remove interfering chemicals and peptides that can leach from the tube walls and interfere or suppress the mass spectrometry signal. In addition, rinsing with Protein-OUT™ removes inadvertent contamination with dust and keratin.

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Wheat germ extract

Wheat germ extract

Supplier: Promega

Wheat germ extract contains the cellular components necessary for protein synthesis (tRNA, ribosomes, initiation, elongation and termination factors).

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Coupled Wheat Germ Extract Systems, TNT®

Coupled Wheat Germ Extract Systems, TNT®

Supplier: Promega

The TNT® Coupled Wheat Germ Extract Systems offer an alternative for eukaryotic cell-free protein expression. Standard wheat germ extract translations commonly use RNA synthesised in vitro from SP6 or T7 RNA polymerase promoters. This entire process requires separate reactions with several steps between each reaction. The TnT® Extracts bypass many of these steps by incorporating transcription directly in the translation mix. Additionally, the TnT® Extract reactions often produce significantly more protein in a 1.5-hour reaction than do standard in vitro wheat germ extract translations using RNA templates.

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Cell lysis reagent, FastBreak™

Cell lysis reagent, FastBreak™

Supplier: Promega

FastBreak™ cell lysis reagent is provided as a 10X concentrate and contains a proprietary non ionic detergent to facilitate lysis. Recombinant proteins can be directly screened in the cell extract or purified by the addition of the appropriate affinity matrix such as the MagneHis™ protein purification system.

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rLys-C, MS grade

rLys-C, MS grade

Supplier: Promega

rLys-C, MS grade, is a recombinant Lys-C expressed in E. coli. It cleaves at C-terminus of lysines.

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Arg-C, sequencing grade

Arg-C, sequencing grade

Supplier: Promega

Arg-C, sequencing grade, is an endopeptidase (clostripain) that cleaves at the C-terminus of arginine residues, including the sites next to proline and it occurs also at proline.

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Endoproteinase Asp-N, sequencing grade

Endoproteinase Asp-N, sequencing grade

Supplier: Promega

Endoproteinase hydrolyses peptide bonds on the N-terminal side of aspartic and cysteic acid residues (Asp and Cys).

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Protease surfactant, trypsin enhancer, ProteaseMAX™

Protease surfactant, trypsin enhancer, ProteaseMAX™

Supplier: Promega

ProteaseMAX™ Surfactant ensures fast and efficient protein digestion with proteases such as trypsin, chymotrypsin and Lys-C.

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Trypsin/Lys-C mix, MS grade

Trypsin/Lys-C mix, MS grade

Supplier: Promega

Trypsin/Lys-C mix improves peptide digestion over trypsin alone, increasing peptide recovery and resulting in better protein quantitation by using standard digestion conditions.

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Rabbit reticulocyte lysate system, Flexi®

Rabbit reticulocyte lysate system, Flexi®

Supplier: Promega

The Flexi® rabbit reticulocyte lysate system allows translation reactions to be optimised for a wide range of parameters, including Mg²⁺ and K⁺ concentrations and the choice to add or omit DTT.

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Rabbit reticulocyte lysate, untreated

Rabbit reticulocyte lysate, untreated

Supplier: Promega

Rabbit Reticulocyte Lysate, Untreated contains the cellular components necessary for protein synthesis (tRNA, ribosomes, amino acids, initiation, elongation and termination factors) but has not been treated with micrococcal nuclease. Untreated Lysate is used primarily for the isolation of these components and as an abundant source of endogenous globin mRNA.

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Rabbit reticulocyte lysate system, nuclease treated

Rabbit reticulocyte lysate system, nuclease treated

Supplier: Promega

Rabbit Reticulocyte Lysate System, Nuclease Treated can be used to identify mRNA species, characterise their protein products and investigate transcriptional and translational control.

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Glu-C, sequencing grade

Glu-C, sequencing grade

Supplier: Promega

Glu-C sequencing grade serine protease (S. aureus V8) specifically cleaves at the C-terminus of either aspartic or glutamic acid residues.

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Trypsin gold, MS grade

Trypsin gold, MS grade

Supplier: Promega

Trypsin Gold, mass spectrometry grade, has been manufactured to provide maximum specificity. Lysine residues in the porcine trypsin have been modified by reductive methylation, yielding a highly active and stable molecule that is extremely resistant to autolytic digestion. The specificity of the purified trypsin is further improved by TPCK treatment, which inactivates chymotrypsin. The treated trypsin is then purified by affinity chromatography and lyophilised.

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Uniform latex particles for immobilisation of biomolecules, PL-Latex

Supplier: VARIAN

Uniform latex particles are used in a wide range of applications that exploit their physico-chemical properties in sophisticated immunoassay formats, both in medicine and veterinary science research.

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