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megazyme.com

The K-XYLX6-1V pack size has been discontinued (read more) The XylX6 assay reagent for the measurement of endo -xylanase (endo -1,4-β-xylanase) contains two components; 1) 4,6- O -(3-Ketobutylidene)-4-nitrophenyl-β-D-4 5 -glucosyl-xylopentaoside and 2) β-xylosidase. The ketone blocking group prevents any hydrolytic action by the β-xylosidase or other exo -acting glycosidases on the XylX6 substrate. Incubation with an endo -xylanase generates a non-blocked colourimetric oligosaccharide that is rapidly hydrolysed by the ancillary β-xylosidase. The rate of formation of 4-nitrophenol is therefore directly related to the hydrolysis of XylX6 by the endo -xylanase. The reaction is terminated and the phenolate colour is developed on addition of Tris buffer solution (pH = 10.0). Need to measure other enzyme activities? View our complete list of assay kits for measurement of enzyme activity. Note that standard curves relating the absorbance obtained using the XylX6 assay to endo -xylanase activity on the native substrates, wheat arabinoxylan and beechwood xylan, are provided in the Supporting Information file under the Documents tab.

stalischem.wordpress.com

I have just finished TESOL certification course with ATI. I took the thickest online program offered: Advanced TESOL Expert Online Certifications. American TESOL Expert program is comprised of thre…

enzymedirectory.com

resource portal for industrial enzymes, research enzymes, plant enzymes, therapeutic enzymes, lipid signaling, cell signalling analysis and more. find enzymes, proteins, substrates, inhibitors or companies

prozomix.com

Prozomix is a world leader in discovery and production of maximum diversity biocatalysts, available for screening via a free-to-use Toolkit