N-(Amino-PEG4)-N-bis(PEG4-propargyl) HCl salt is a trifunctional linker with two terminal alkynes and a primary amine. The terminal alkynes can be linked to azides using copper click chemistry while the primary amine is reactive towards carboxylic acids, NHS esters, ketones and aldehydes to form a variety of stable bonds.

N-(Amino-PEG4)-N-bis(PEG4-propargyl) HCl salt is a trifunctional linker with two terminal alkynes and a primary amine. The terminal alkynes can be linked to azides using copper click chemistry while the primary amine is reactive towards carboxylic acids, NHS esters, ketones and aldehydes to form a variety of stable bonds.

K-CellG5-4V

SKU: 700004272

The K-CellG5-2V pack size has been discontinued (read more).

Cellulase Activity Assay Kit.

The CellG5 assay reagent for the measurement of endo-cellulase (endo-1,4-β-glucanase) contains two components; 1) 4,6-O-(3-Ketobutylidene)-4-nitrophenyl-β-D-cellopentaoside (BPNPG5) and 2) thermostable β-glucosidase. The ketone blocking group prevents any hydrolytic action by the β-glucosidase on BPNPG5.  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 4-nitrophenol is therefore directly related to the hydrolysis of BPNPG5 by the endo-cellulase. The reaction is terminated and the phenolate colour is developed on addition of Tris buffer solution (pH 9.0).

The CellG5 assay represents a huge step forward in the methodology for the measurement of cellulase that traditionally relied on substrates such as CM-cellulose, Avicel, cellooligosaccharides, filter paper or dyed polysaccharides including CMC Congo red or cellulose azure.

View Cellulase Activity Assay Protocol.

View our complete list of assay kits for enzyme activities.

The CellG5 assay reagent for the measurement of endo-cellulase (endo-1,4-β-glucanase) contains two components; 1) 4,6-O-(3-Ketobutylidene)-4-nitrophenyl-β-D-cellopentaoside (BPNPG5) and 2) thermostable β-glucosidase. The ketone blocking group prevents any hydrolytic action by the β-glucosidase on BPNPG5. 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 4-nitrophenol is therefore directly related to the hydrolysis of BPNPG5 by the endo-cellulase. The reaction is terminated and the phenolate colour is developed on addition of Tris buffer solution (pH 9.0).

Diagnosticgrade – because RUO and IVDR do not fit together

This unique quality seal ensures high quality and performance of raw materials ideally suited for use in development projects for IVD

With the DiagnosticGrade seal, the partners Johner Institut and myPOLS Biotec combine high-quality products, including reliable and reproducible product performance and knowledge on product verification procedures, including documentation to meet the requirements of the IVDR:

• IVD manufacturers can obtain reagents developed and produced by myPOLS Biotec under ISO 13485.
• We offer you the quality and safety that the IVDR requires from suppliers – these are, for example, control of suppliers via quality assurance agreements, information about changes, consent to audits.
• The Johner Institute provides  structured templates for the documentation of your product verification with clear and brief explanations of how to complete them.

Both cooperation partners express with the DiagnosticGrade seal that the reagents meet the relevant requirements and thus ensure the maturity level for diagnostics.

Diagnsoticgrade facilitates the development of new IVD assay products for IVD manufacturers and enables IVDR compliance of existing kits.

Please find more information on www.diagnosticgrade.de (in german) or contact us directly. About the Johner Institut: https://www.johner-institut.de

With the DiagnosticGrade seal, the partners Johner Institut and myPOLS Biotec combine high-quality products, including reliable and reproducible product performance and knowledge on product verification procedures, including documentation to meet the requirements of the IVDR: