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Xylazyme Tablets

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Analysis of enzymes activity using carbohydrase tablet testing

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Chapter 1: Theory of endo-1, 4-Beta-D-Xylanase Assay Procedure
Chapter 2: Buffers & Reagents
Chapter 3: Assay Procedure
Product code: T-XYZ-200T



200 Tablets

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Content: 200 Tablets or 1,000 Tablets
Shipping Temperature: Ambient
Storage Temperature: Ambient
Physical Form: Solid
Stability: > 2 years under recommended storage conditions
Substrate For (Enzyme): endo-1,4-β-Xylanase
Assay Format: Spectrophotometer
Detection Method: Absorbance
Wavelength (nm): 590
Reproducibility (%): ~ 5%

High purity dyed and crosslinked Xylazyme (100 mg tablets) for the measurement of enzyme activity, for research, biochemical enzyme assays and in vitro diagnostic analysis.

For the assay of endo-1,4-β-D-xylanase. Containing AZCL-arabinoxylan (wheat). This substrate is the same as Xylazyme AX except for the larger tablet size (i.e. 100 mg cf. 60 mg) and slightly different assay format.

Please note the video above shows the protocol for assay of endo-xylanase using Xylazyme AX tablets. The procedure for the assay of endo-1,4-β-Xylanase using Xylazyme Tablets is equivalent to this.

Looking for other product? See our complete list of enzyme tablet tests.

Certificate of Analysis
Safety Data Sheet
Assay Protocol
Megazyme publication
Novel substrates for the automated and manual assay of endo-1,4-β-xylanase.

Mangan, D., Cornaggia, C., Liadova, A., McCormack, N., Ivory, R., McKie, V. A., Ormerod, A. & McCleary, D. V. (2017). Carbohydrate Research, 445, 14-22.

endo-1,4-β-Xylanase (EC is employed across a broad range of industries including animal feed, brewing, baking, biofuels, detergents and pulp (paper). Despite its importance, a rapid, reliable, reproducible, automatable assay for this enzyme that is based on the use of a chemically defined substrate has not been described to date. Reported herein is a new enzyme coupled assay procedure, termed the XylX6 assay, that employs a novel substrate, namely 4,6-O-(3-ketobutylidene)-4-nitrophenyl-β-45-O-glucosyl-xylopentaoside. The development of the substrate and associated assay is discussed here and the relationship between the activity values obtained with the XylX6 assay versus traditional reducing sugar assays and its specificity and reproducibility were thoroughly investigated.

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Megazyme publication

Optimising the response.

Acamovic, T. & McCleary, B. V. (1996). Feed Mix, 4, 14-19.

A fine balance exists between enzyme activity and the adverse effects associated with feed processing. Accurate estimation of enzyme activity in the feed is a pre-requisite to optimising the response.

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Megazyme publication
Comparison of endolytic hydrolases that depolymerise 1,4-β-D-mannan, 1,5-α-L-arabinan and 1,4-β-D-galactan.

McCleary, B. V. (1991). “Enzymes in Biomass Conversion”, (M. E. Himmel and G. F. Leatham, Eds.), ACS Symposium Series, 460, Chapter 34, pp. 437-449. American Chemical Society, Washington.

Hydrolysis of mannan-type polysaccharides by β-mannanase is dependent on substitution on and within the main-chain as well as the source of the β-mannanase employed. Characterisation of reaction products can be used to define the sub-site binding requirements of the enzymes as well as the fine-structures of the polysaccharides. Action of endo-arabinanase and endo-galactanase on arabinans and arabinogalactans is described. Specific assays for endo-arabinanase and arabinan (in fruit-juice concentrates) are reported.

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Megazyme publication

Measurement of polysaccharide degrading enzymes using chromogenic and colorimetric substrates.

McCleary, B. V. (1991). Chemistry in Australia, September, 398-401.

Enzymic degradation of carbohydrates is of major significance in the industrial processing of cereals and fruits. In the production of beer, barley is germinated under well defined conditions (malting) to induce maximum enzyme synthesis with minimum respiration of reserve carbohydrates. The grains are dried and then extracted with water under controlled conditions. The amylolytic enzymes synthesized during malting, as well as those present in the original barley, convert the starch reserves to fermentable sugars. Other enzymes act on the cell wall polysaccharides, mixed-linkage β-glucan and arabinoxylan, reducing the viscosity and thus aiding filtration, and reducing the possibility of subsequent precipitation of polymeric material. In baking, β-amylase and α-amylase give controlled degradation of starch to fermentable sugars so as to sustain yeast growth and gas production. Excess quantities of α-amylase in the flour result in excessive degradation of starch during baking which in turn gives a sticky crumb texture and subsequent problems with bread slicing. Juice yield from fruit pulp is significantly improved if cell-wall degrading enzymes are used to destroy the three-dimensional structure and water binding capacity of the pectic polysaccharide components of the cell walls. Problems of routine and reliable assay of carbohydrate degrading enzymes in the presence of high levels of sugar compounds are experienced with such industrial process.

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Megazyme publication

Measurement of endo-1,4-β-D-xylanase.

McCleary, B. V. (1992). “Xylans and Xylanases”, (J. Visser, G. Beldman, M. A. Kusters-van Someron and A. G. J. Voragen, Eds.), Progress in Biotechnology, Vol. 7, Elsevier, Science Publishers B. V., pp. 161-169.

Various procedures for the measurement of xylanase in fermentation broths, commercial enzyme mixtures, bread improver mixtures and feed samples are described. Problems associated with the routine use of reducing-sugar based methods axe highlighted and the advantages and limitations of viscometric and dye-labelled substrate procedures for measurement of trace levels of activity in feed samples are discussed.

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Recent Advances and future Perspectives of Thermostable Xylanase.

Selvarajan, E. & Veena, R. (2017). Biosciences Biotechnology Research Asia, 14(1), 421-438.

The xylan degrading enzyme, xylanase can be used to develop eco-friendly technologies mainly in the paper and pulp industries. By using this enzyme, the lignocelluloses materials can be modified to produce high quality liquid fuel and other products. There is a wide range of applications for the xylanase as an enzyme and more with thermostable xylanase. The Fungal strains are considered most potent for xylanase production, while the yeast and bacteria produce it in low quantities. The production of these enzymes, at low quantity, can be further enhanced by the Genetic engineering techniques like mutation, cloning and expression in various organisms. The genomic studies have helped to come across the basic barriers like low production, enzyme stability etc. The xylanase producing gene is isolated in microorganisms, made modifications and is cloned into a heterologous or a homologous host for the enhanced production, to meet the industrial demand. Thus this review concentrates about the production parameters, immobilization techniques and the applications briefly.

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Effect of xylanases on ileal viscosity, intestinal fiber modification, and apparent ileal fiber and nutrient digestibility of rye and wheat in growing pigs.

Lærke, H. N., Arent, S., Dalsgaard, S. & Knudsen, K. B. (2015). Journal of Animal Science, 93(9), 4323-4325.

Two experiments were performed to study the effect of xylanase on ileal extract viscosity, in vivo fiber solubilization and degradation, and apparent ileal digestibility (AID) of fiber constituents, OM, CP, starch, and crude fat in rye and wheat in ileal-cannulated pigs. In Exp. 1, coarse rye without (NX) or with addition of xylanase from Aspergillus niger (AN), Bacillus subtilis (BS), or Trichoderma reesei (TR) was fed to 8 ileal-cannulated barrows (initial BW 30.9 ± 0.3 kg) for 1 wk each according to a double 4 × 4 Latin square design. In Exp. 2, fine rye, fine wheat, and coarse wheat with or without a combination of xylanase from Bacillus subtilis and Trichoderma reesei were fed to 6 ileal-cannulated barrows (initial BW 33.6 ± 0.5 kg) for 1 wk according to a 6 × 6 Latin square design with a 2 × 3 factorial arrangement of enzyme and cereal matrix. Chromic oxide (0.2%) was used as an inert marker. Ileal effluent was collected for 8 h on d 5 and 7 and pooled for analysis. In Exp. 1, TR reduced intestinal viscosity of pigs fed rye from 9.3 mPa·s in the control diet (NX) to 6.0 mPa·s (P < 0.001), whereas AN and BS had no effect. None of the enzymes changed the concentration of total arabinoxylan, high-molecular-weight arabinoxylan (HMW-AX), or arabinoxylan oligosaccharides (AXOS) in the liquid phase of digesta. In Exp. 2, the enzyme combination reduced intestinal viscosity for all 3 cereal matrices (P < 0.05), but the viscosity was much higher with fine rye (7.6 mPa·s) than with fine and coarse wheat (P < 0.002) and by 45.9% in coarse wheat (P < 0.006), and AXOS increased 16-fold with enzyme addition. Similar effects of enzyme were not seen with rye. The concentration of xylooligosaccharides in the liquid phase of digesta increased with enzyme addition, but for xylose, it was only significant for wheat, for which it increased 3.9-fold (P < 0.001). None of the xylanases affected AID of arabinoxylan of rye in Exp. 1. In Exp. 2, the enzyme combination increased AID of arabinoxylan by 91% to 107% (P < 0.001) across cereal matrices. Enzyme addition did not affect AID of nutrients in any of the experiments except for a higher starch and crude fat digestibility of fine wheat with enzyme addition (P < 0.012) in Exp. 2. Collectively, the results suggest that xylanase is more efficient in degrading arabinoxylan from wheat than from rye.

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Disruption of the L‐arabitol dehydrogenase encoding gene in Aspergillus tubingensis results in increased xylanase production.

Nikolaev, I., Farmer Hansen, S., Madrid, S. & de Vries, R. P. (2013). Biotechnology Journal, 8(8), 905-911.

Fungal xylanases are of major importance to many industrial sectors, such as food and feed, paper and pulp, and biofuels. Improving their production is therefore highly relevant. We determined the molecular basis of an improved xylanase-producing strain of Aspergillus tubingensis that was generated by UV mutagenesis in an industrial strain improvement program. Using enzyme assays, gene expression, sequencing of the ladA locus in the parent and mutant, and complementation of the mutation, we were able to show that improved xylanase production was mainly caused by a chromosomal translocation that occurred between a subtilisin-like protease pepD gene and the L-arabitol dehydrogenase encoding gene (ladA), which is part of the L-arabinose catabolic pathway. This genomic rearrangement resulted in disruption of both genes and, as a consequence, the inability of the mutant to use L-arabinose as a carbon source, while growth on D-xylose was unaffected. Complementation with constitutively expressed ladA confirmed that the xylanase overproducing phenotype was mainly caused by loss of ladA function, while a knockout of xlnR in the UV mutant demonstrated that improved xylanase production was mediated by XlnR. This study demonstrates the potential of metabolic manipulation for increased production of fungal enzymes.

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Mapping of residues involved in the interaction between the Bacillus subtilis xylanase A and proteinaceous wheat xylanase inhibitors.

Sørensen, J. F. & Sibbesen, O. (2006). Protein Engineering Design & Selection, 19(5), 205-210.

The Bacillus subtilis xylanase A was subjected to site-directed mutagenesis, aimed at changing the interaction with Triticum aestivum xylanase inhibitor, the only wheat endogenous proteinaceous xylanase inhibitor interacting with this xylanase. The published structure of Bacillus circulans XynA was used to target amino acids surrounding the active site cleft of B.subtilis XynA for mutation. Twenty-two residues were mutated, resulting in 62 different variants. The catalytic activity of active mutants ranged from 563 to 5635 XU/mg and the interaction with T.aestivum xylanase inhibitor showed a similar variation. The results indicate that T.aestivum xylanase inhibitor interacts with several amino acid residues surrounding the active site of the enzyme. Three different amino acid substitutions in one particular residue (D11) completely abolished the interaction between T.aestivum xylanase inhibitor and B.subtilis xylanase A.

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Safety evaluation of a xylanase expressed in Bacillus subtilis.

Harbak, L. & Thygesen, H. V. (2002). Food and Chemical Toxicology, 40(1), 1-8.

A programme of studies was conducted to establish the safety of a xylanase expressed in a self-cloned strain of Bacillus subtilis to be used as a processing aid in the baking industry. To assess acute and subchronic oral toxicity, rat feeding studies were conducted. In addition, the potential of the enzyme to cause mutagenicity and chromosomal aberrations was assessed in microbial and tissue culture in vitro studies. Acute and subchronic oral toxicity was not detected at the highest dose recommended by OECD guidelines. There was no evidence of mutagenic potential or chromosomal aberrations. Furthermore, the organism used for production of the xylanase is already accepted as safe by several major national regulatory agencies.

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Safety Data Sheet
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