N-(Amine-PEG8)-N-bis(PEG8-Propargyl) is a trifunctional linker containing an amino group and two terminal alkynes. These alkynes are frequently used in copper (I) click reactions with azides to form stable triazole linkages, while the primary amine is reactive towards carboxylic acids and other carbonyl compounds such as NHS esters, aldehydes or ketones.
N-(Amine-PEG8)-N-bis(PEG8-Propargyl) is a trifunctional linker containing an amino group and two terminal alkynes. These alkynes are frequently used in copper (I) click reactions with azides to form stable triazole linkages, while the primary amine is reactive towards carboxylic acids and other carbonyl compounds such as NHS esters, aldehydes or ketones.
K-CellG5-4V
SKU: 700004272
| Content: | (K-CellG5-4V) 120 / 240 assays (manual) / 480 assays (auto-analyser) or (K-CellG5-2V) 60 / 120 assays (manual) / 240 assays (auto-analyser) |
| Shipping Temperature: | Ambient |
| Storage Temperature: | Short term stability: 2-8oC, Long term stability: See individual component labels |
| Stability: | > 2 years under recommended storage conditions |
| Analyte: | endo-Cellulase |
| Assay Format: | Spectrophotometer, Auto-analyser |
| Detection Method: | Absorbance |
| Wavelength (nm): | 400 |
| Signal Response: | Increase |
| Limit of Detection: | 1.2 x 10-3 U/mL |
| Reproducibility (%): | ~ 3% |
| Total Assay Time: | 10 min |
| Application examples: | Fermentation broths, industrial enzyme preparations and biofuels research. |
| Method recognition: | Novel method |
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).
Permagen’s 50 mL Centrifuge Tube Magnetic rack is designed for magnetic bead separations from up to six, 50 mL Centrifuge tubes
Accommodates any common 50 mL Centrifuge Tubes
Beads will be pulled to back wall allowing easy aspiration and tip tracking down the front wall of the tubes without disturbing bead pellet
Features include solid aluminum alloy design with hard coat finish for years of trouble-free use, rubber feet to help prevent slipping on work bench, less tippy than common plastic products, and fast separations using any magnetic beads
MSR6X50
Maximum Volume – 50 mL
Minimum Volume – 10 mL
Permagen’s 50 mL Centrifuge Tube Magnetic rack is designed for magnetic bead separations from up to six, 50 mL Centrifuge tubes
NEST 96 Well Plate Flat, polystyrene, sterile, DNase, RNase, pyrogen, and endotoxin free. Individually wrapped.
100 count, 200 uL max volume per well
Labware definition is available for immediate use in Opentron’s Labware Library
NEST 96 Well Plate Flat, polystyrene, sterile, DNase, RNase, pyrogen, and endotoxin free. Individually wrapped.
100 count, 200 uL max volume per well
Labware definition is available for immediate use in Opentron’s Labware Library
