Overview
Alpha-amylase is an enzyme that breaks down starch into simpler sugars like maltose and dextrins. It is produced by organisms ranging from bacteria to humans and plays a vital role in digestion and industrial processes. In industries, microbial-derived alpha-amylase is preferred due to its stability and efficiency. The enzyme is classified under EC 3.2.1.1 and is essential in sectors like food, brewing, and biofuels.
Physical and Chemical Properties
Alpha-amylase is typically a powder or liquid with optimal activity at temperatures of 50–90°C and a pH range of 5.0–7.0, depending on the source. Bacterial amylases are often more thermostable than fungal ones. The enzyme’s activity is measured in units (U), where one unit hydrolyzes 1 μmol of starch per minute under standard conditions. It loses activity in extreme pH or high temperatures due to denaturation.
Main Applications
In food processing, alpha-amylase converts starch into sweeteners (e.g., high-fructose corn syrup) and improves dough texture in baking. The brewing industry uses it to ferment sugars from grains. Biofuel production relies on alpha-amylase to break down plant starches into fermentable sugars for ethanol. It also aids in textile desizing and paper manufacturing.
Safety and Storage
Alpha-amylase is generally safe but may irritate skin or eyes. Use protective gear when handling concentrated forms. Store at 2–8°C to preserve activity; avoid moisture and direct sunlight. For liquid formulations, check for preservatives to prevent microbial growth. Bulk procurement requires airtight containers to maintain shelf life (typically 6–12 months).
B2B Procurement Guide
Buyers should specify activity units (U/mg), thermostability, and source (e.g., Bacillus licheniformis for high-temperature applications). Pricing depends on purity, with food-grade costing more than industrial-grade. Reliable suppliers provide certificates of analysis (CoA) for batch consistency. Consider bulk discounts for orders above 100 kg, but verify storage capacity to avoid waste.
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