DBCO-PEG9-DBCO is a click chemistry linker with two DBCO groups and a hydrophilic PEG spacer arm. DBCO is reactive with azide-bearing compounds or biomolecules to form a stable triazole linkage without copper catalyst. The hydrophilic PEG9 arm increase water solubility and membrane permability. Reagent grade, for research purpose. Please contact us for GMP-grade inquiries.

DBCO-PEG9-DBCO is a click chemistry linker with two DBCO groups and a hydrophilic PEG spacer arm. DBCO is reactive with azide-bearing compounds or biomolecules to form a stable triazole linkage without copper catalyst. The hydrophilic PEG9 arm increase water solubility and membrane permability. Reagent grade, for research purpose. Please contact us for GMP-grade inquiries.

K-CellG3

180 / 360 assays per kit

This product has been discontinued (read more).

The CellG3 assay reagent for the measurement of endo-cellulase (endo-1,4-β-glucanase) contains two components; 
1) 4,6-O-benzylidene-2-chloro-4-nitrophenyl-β-D-cellotrioside (BCNPG3) and 2) thermostable β-glucosidase. The benzylidene blocking group prevents any hydrolytic action by the β-glucosidase on BCNPG3.  Incubation with an endo-cellulase generates a non-blocked colourimetric oligosaccharide that is rapidly hydrolysed by the ancillary β-glucosidase.  The rate of formation of 2-chloro-4-nitrophenol is therefore directly related to the hydrolysis of BCNPG3 by the endo-cellulase.  The reaction is terminated and the phenolate colour is developed on addition of Tris buffer solution (pH 9.0).

Please note that a new assay kit (K-CellG5) is now available for the measurement of endo-cellulase.  The CellG5 reagent contains a cellopentaose core and exhibits vastly improved sensitivity for some cellulases.  In addition, the exchange of the benzylidene blocking group in CellG3 for 3-keto-butylidene in CellG5 improves the substrate’s water solubility significantly, allowing for a reduction in the concentration of DMSO required in the assay.  As DMSO is known to inhibit certain cellulases, this is another benefit in using CellG5.  Megazyme now recommends the use of K-CellG5 for all assays for the measurement of endo-cellulase.

Browse more cellulase and other enzyme activity assay kits.

The CellG3 assay reagent for the measurement of endo-cellulase (endo-1,4-β-glucanase) contains two components;
1) 4,6-O-benzylidene-2-chloro-4-nitrophenyl-β-D-cellotrioside (BCNPG3) and 2) thermostable β-glucosidase. The benzylidene blocking group prevents any hydrolytic action by the β-glucosidase on BCNPG3. Incubation with an endo-cellulase generates a non-blocked colourimetric oligosaccharide that is rapidly hydrolysed by the ancillary β-glucosidase. The rate of formation of 2-chloro-4-nitrophenol is therefore directly related to the hydrolysis of BCNPG3 by the endo-cellulase. The reaction is terminated and the phenolate colour is developed on addition of Tris buffer solution (pH 9.0).

Introduction

HiPure Gel Pure DNA Kit uses proprietary chemistry and HiPure technology to recover DNA fragments between 80bp-15kbp with yields exceeding 80%. DNA is suitable for ligations, PCR, sequencing, restriction digestion, or various labeling reactions. In addition, this kit can be also used to recover DNA directly from enzymatic reactions such as PCR and enzyme digestion reactions.

Note: This kit can only recover 200mg of gel at most. If it is larger than 200mg, the column may be blocked. This column can only recover 5μg of DNA at most.

Details

Specifications

Principle

The HiPure system uses a simple bind-wash-elute procedure. Gel slices are dissolved in a buffer containing a pH indicator, allowing easy determination of the optimal pH for DNA binding, and the mixture is applied to the column. Nucleic acids adsorb to the silica-gel membrane in the high-salt conditions provided by the buffer. Impurities are washed away and pure DNA is eluted with a small volume of low-salt buffer provided or water, ready to use in subsequent applications.

Advantages

• High recovery efficiency – up to 80% DNA recovery
• Low elution volume – elution volume can be as low as 10μl
• General – recover DNA fromgel or enzyme-driven reaction solutions such as PCR
• Fast – isolation can be completed in 10-15 minutes by column gel method

Kit Contents

Storage and Stability

The Kit should be stored dry at room temperature (15-25°C) and are stable for at least 18 months under these conditions. If any precipitates form in the buffers, warm at 37℃ to dissolve

HiPure Gel Pure DNA Kit uses proprietary chemistry and HiPure technology to recover DNA fragments between 80bp-15kbp with yields exceeding 80%. DNA is suitable for ligations, PCR, sequencing, restriction digestion, or various labeling reactions. In addition, this kit can be also used to recover DNA directly from enzymatic reactions such as PCR and enzyme digestion reactions.

Note: This kit can only recover 200mg of gel at most. If it is larger than 200mg, the column may be blocked. This column can only recover 5μg of DNA at most.