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Acidic Xylan

Updated: 2026-07-19

Overview

Acidic xylanase is an enzyme that catalyzes the hydrolysis of xylan, a polysaccharide found in plant cell walls, into simpler sugars like xylose. It operates optimally under acidic conditions (pH 4.0-6.0), making it suitable for industries where low pH environments are common. The enzyme is derived from microbial sources, such as fungi or bacteria, and is prized for its specificity and efficiency in breaking down hemicellulose. Unlike neutral or alkaline xylanases, acidic variants are particularly useful in applications like animal feed digestion, where the stomach's acidic environment aligns with the enzyme's optimal pH range. Its role in biofuel production is also significant, as it aids in the pretreatment of lignocellulosic biomass to release fermentable sugars.

Physical and Chemical Properties

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Acidic xylanase typically appears as a light brown or white powder, soluble in water. Its molecular weight ranges between 20-50 kDa, depending on the microbial source. The enzyme exhibits peak activity at temperatures of 50-60°C and pH levels of 4.0-6.0, though some engineered variants may tolerate broader ranges. One of its defining features is thermostability, which allows it to retain activity under moderate heat, though prolonged exposure to temperatures above 60°C can lead to denaturation. The enzyme is sensitive to heavy metals and strong oxidants, which can inhibit its activity. Storage at 2-8°C in dry conditions is recommended to preserve its shelf life.

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Main Applications

In the animal feed industry, acidic xylanase is added to poultry and swine diets to improve nutrient absorption by breaking down non-starch polysaccharides in grains. This enhances feed efficiency and reduces digestive issues. The food industry uses it to clarify juices, modify dough texture, and produce xylooligosaccharides as prebiotics. The pulp and paper industry employs acidic xylanase to reduce chlorine usage in bleaching processes, making production more environmentally friendly. In biofuel production, the enzyme is critical for pretreating agricultural residues like corn stover or wheat straw, converting them into fermentable sugars for ethanol production.

Safety and Storage

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While acidic xylanase is generally non-toxic, direct contact with the powder may cause mild skin or respiratory irritation. Workers should use gloves, masks, and goggles when handling large quantities. Spills should be cleaned with water and avoided in drains to prevent environmental contamination. Proper storage is essential to maintain enzyme activity. The product should be kept in a sealed container, protected from moisture and sunlight, at 2-8°C. Long-term stability can vary by formulation, so buyers should check the manufacturer's specifications for shelf-life recommendations.

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B2B Procurement Guide

When procuring acidic xylanase, B2B buyers should prioritize suppliers that provide detailed product specifications, including enzyme activity (measured in units per gram, U/g) and microbial source (e.g., Aspergillus or Trichoderma). Certifications like ISO, FDA, or GRAS status are indicators of quality and safety compliance. Bulk purchases often come with discounts, but buyers should confirm storage capabilities to avoid spoilage. Testing small batches for compatibility with specific applications (e.g., feed mix stability) is advisable before large-scale orders. Prices vary by purity and volume, with typical ranges of $20-$50/kg.

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