Overview
Neutral/acid proteases are hydrolytic enzymes that break down proteins into peptides and amino acids under neutral to mildly acidic conditions (pH 3.0-7.0). Unlike alkaline proteases, they are ideal for applications where alkaline pH would damage substrates. These enzymes are derived from microbial sources such as Aspergillus oryzae (fungal) or Bacillus subtilis (bacterial). Industrially, they are produced via fermentation and standardized by activity units (U/g). Their specificity varies by source, with fungal proteases often preferred for food-grade applications due to regulatory acceptance. Neutral/acid proteases are biodegradable and replace harsh chemical hydrolysis in many processes.
Physical and Chemical Properties
Neutral/acid proteases exhibit optimal activity between pH 4.0-6.5 and temperatures of 40-60°C, though some variants remain stable up to 70°C. They are inactivated by heavy metals (e.g., Hg²⁺) and oxidizing agents. The enzymes are typically supplied as lyophilized powders or stabilized liquid formulations with preservatives like glycerol. Their molecular structure includes a catalytic site with aspartic or cysteine residues, depending on the subclass. Shelf life ranges from 6-24 months when stored properly. Activity loss occurs if exposed to humidity or temperatures above 25°C for extended periods.
Main Applications
In food processing, neutral/acid proteases tenderize meat, modify dough elasticity, and clarify beverages like beer by degrading haze-forming proteins. Breweries use them to accelerate fermentation and improve yield. The pharmaceutical industry employs these enzymes for peptide synthesis and digestive aid formulations. Additional uses include leather processing (bating), waste treatment (protein hydrolysis), and specialty detergents for delicate fabrics. Recent R&D focuses on biofuel production, where proteases pretreat protein-rich biomass to enhance sugar release.
Safety and Storage
While generally recognized as safe (GRAS) for food use, neutral/acid proteases may cause respiratory or skin irritation in concentrated forms. OSHA recommends dust masks and gloves during handling. Spills should be neutralized with water and contained to prevent slips. Storage requires airtight containers at 2-8°C for powders; liquids may need refrigeration. Avoid freezing, as ice crystals can denature the enzyme. Stability is maximized in buffered solutions at pH 5.0-6.0. Always check COA (Certificate of Analysis) for microbial limits and activity retention.
B2B Procurement Guide
When sourcing neutral/acid proteases, prioritize suppliers with ISO 9001 certification and batch-specific COAs. Key specifications include activity (e.g., 50,000 U/g), thermostability, and absence of unauthorized microbial strains. Food-grade enzymes require FDA or EU compliance documentation. Bulk purchases (25+ kg) often reduce costs by 10-30%. Consider trial batches to test compatibility with your process. Logistics should ensure cold-chain transport for liquid forms. Some manufacturers offer custom blends for niche applications like plant-based protein hydrolysis.
Related Manufacturers
- 主营：碱性蛋白酶、果胶酶、高温淀粉酶、过氧化氢酶
- 主营：[]
- 主营：牛筋面、甘氨酸、白色素、中性蛋白酶、水苏糖、红曲黄、可可壳、海藻糖、儿茶素、干面条、食品果、精氨酸、胡萝卜、酪蛋白、磷酸氢、牛磺酸、食品bha、纤维素、茶氨酸、乳糖酶、醋酸钠、乳酸钠、黄原胶、沙棘黄、儿茶黑、黑豆红
- 主营：18908-66-2、癸甲氯铵、咪唑烷酮、蛋白酶、二异丁腈、饲料添加剂、分散剂工业、柠檬酸三丁酯、聚乙烯吡咯烷、二甲基溴化铵
- 主营：退浆剂、脂肪酶、退浆酶、蛋白酶、中性酵素水、去除剂、紫孢菌、发酵剂、淀粉酶、发酵菌、酵洗酵素、液化淀粉、芽孢杆菌、脱氮菌种、绿色木霉、纤维素酶、牛皮羊皮、硝化细菌、拟青霉菌、土壤改良、毛粉角蛋白、甘露聚糖酶、高活性菌种、肥料益生菌、皮革软化酶
- 主营：退浆剂、脂肪酶、退浆酶、蛋白酶、食毛剂、果胶酶、除氧酶、黑曲霉、功能菌、糖化酶、乳酸菌、酵素水、抛光酶、植酸酶、纤柔酶、cod去除、腐熟剂、施胶酶、发酵剂、淀粉酶、cod菌种、cod降解、专用em菌、水产em菌、氢分解酶
- 主营：化工中间体、有机中间体、香精香料、天然/合成树脂、添加剂、表面活性剂、分析试剂、日化原料、催化剂、高分子材料
- 主营：磷酸三钙、钡玻璃粉、锶玻璃粉、虫胶粉/精制紫胶、木瓜蛋白酶、生物活性玻璃、全氟三丁胺、卡波姆树脂、月桂酰赖氨酸、低温玻璃粉、磺化栲胶、聚酰亚胺pi树脂微粉、八甘醇、羟基磷灰石、高取代羟丙基纤维素、异戊橡胶、杜仲胶、二水硫酸钙、壳聚糖、氢化卵磷脂、辛烯基琥珀酸淀粉钠、花椒麻素、甲氧基聚乙二醇丙烯酸、维生素A棕榈酸酯、水解胶原蛋白锌
- 主营：化工原料、中间体、表面活性剂、蛋白酶、香精香料、催化剂、硅油
- 主营：甜菊糖、甘氨酸、胡萝卜、中性蛋白酶价格、麦香宝、海藻糖、桑椹红、辣椒精、南瓜粉、五香粉、增脆剂、他拉胶、白色素、酪蛋白、莓香精、烟酰胺、牛磺酸、褪黑素、磷酸铁、螺旋藻、调节剂、温轮胶、胞苷酸、菊糖酶、卡拉胶、风味酶
- 主营：增稠剂、营养强化剂、抗氧化剂、食品级中性蛋白酶、乳化剂、增味剂、酶制剂、酸味剂、维生素、甜味剂
- 主营：营养强化剂、抗氧化剂、甜味剂、蛋白酶、食品级增稠剂、食用色素、酶制剂、粉末香精、酸度调节剂、食品乳化剂、着色剂、抗结剂、增味剂
- 主营：营养强化剂、抗氧化剂、增稠剂、蛋白酶、酶制剂、酸味剂、食用色素、粉末香精、黄原胶
- 主营：藤茶提取物、枳椇子提取物、二氢槲皮素、木瓜蛋白酶、槲皮素、地龙蛋白肽、马齿苋提取物、甘草提取物、黄芪粉、罗汉果粉、鱼腥草提取物、淡竹叶提取物、竹叶黄酮、葛根提取物、玉米低聚肽、酸枣仁提取物、荷叶提取物、人参提取物、蒲公英提取物、益智仁提取物、桑叶提取物、阿胶粉、麦芽提取物
- 主营：碱性蛋白酶、植提专用酶、防腐剂系列、增稠剂系列
- 主营：过氧化氢酶、漆酶、溶菌酶、碱性蛋白酶、蛋白酶、胰蛋白酶、角蛋白酶、淀粉酶、果胶酶、脂肪酶、洗涤酶、造纸酶、皮革酶、纺织酶、饲料酶、纤维素酶
- 主营：果胶酶、过氧化氢酶、淀粉酶、碱性蛋白酶、胃蛋白酶、胰蛋白酶、溶菌酶、烘焙专用酶、纤维素酶、洗涤工业酶、漆酶、皮革工业酶、植酸酶、甘露聚糖酶、单宁酶、乙酰乳酸脱羧酶、葡聚糖酶、菊糖酶、饲料酶、纺织工业酶、造纸工业酶、木聚糖酶、葡萄糖氧化酶
- 主营：杀菌剂、椰子油、印染剂、酸性蛋白酶厂家、阻燃剂、油酸锌、润湿剂、硫酸铯、催化剂、粘合剂、乳化剂、草酸锰、硫酸锂、石英砂、绝缘油、茶皂素、防腐剂、醋酸镁、锂电池、碘化锂、培养基、蒸馏水、硬脂酸、塑化剂、草酸钾、磷酸铁
- 主营：烟酰胺、泛酸钙、生物素、酸性蛋白酶厂家、黄原胶、瓜尔胶、L-半胱氨酸盐酸盐、海藻酸钠、海藻糖、谷氨酸、卡拉胶、乳清粉、赤藓糖醇、结晶果糖、木糖醇、甜菜碱、螺旋藻、乳清蛋白粉、氯化胆碱、酪蛋白、肌酸、色氨酸、赖氨酸、鱼油粉、刺槐豆胶、阿拉伯胶
- 主营：酪蛋白酸钠 酪朊酸钠、氯化胆碱、甜菜碱、酸性蛋白酶厂家、酵母浸粉、蛋白胨、低聚果糖、低聚木糖、甘露寡糖、菊粉、D-异抗坏血酸钠、ε-聚赖氨酸、ε-聚赖氨酸盐酸盐、乳酸链球菌素、BHA 丁基羟基茴香、茶多酚 绿茶提取物、阿拉伯胶、刺槐豆胶、瓜尔豆胶 瓜尔胶、果胶 高酯果胶 低酯、海藻酸钠、黄原胶、结冷胶 低酰基结冷胶、聚丙烯酸钠
- 主营：甜味剂、木糖醇、纽甜、蛋白酶、甜味添加剂、海藻糖、营养强化剂、牛磺酸、维生素C、香精、氨基葡萄糖盐酸盐
- 主营：维生素、营养强化剂、增稠剂、酸性蛋白酶厂家、甜味剂
- 主营：阿拉伯胶、刺槐豆胶、瓜尔豆胶、酸性蛋白酶厂家、果胶、海藻酸丙二醇酯、海藻酸钠、黄原胶、结冷胶、聚丙烯酸钠、卡波姆、抗性糊精、可得然胶、魔芋粉、塔拉胶、琼脂、沙蒿籽胶、羧甲基淀粉钠、明胶、温轮胶、阿斯巴甜、低聚果糖、低聚木糖、结晶果糖、菊粉、纽甜
- 主营：保鲜剂、鲜味剂、l-苯丙氨酸、中性蛋白酶生产厂家、l-谷氨酰胺、营养增补剂、面包发酵剂、食品添加剂、烘焙调味品、营养强化剂
- 主营：L-半胱氨酸、L-苯丙氨酸、L-谷氨酸、酸性蛋白酶厂家、L-蛋氨酸、L-谷氨酰胺、L-瓜氨酸、L-精氨酸、L-赖氨酸、L-酪氨酸、L-亮氨酸、L-色氨酸、L-天门冬氨酸、L-缬氨酸、L-异亮氨酸、L-组氨酸、甘氨酸、γ-氨基丁酸、L-谷氨酸钾、维生素A、维生素B1、维生素B12、维生素B2、维生素B5、维生素B6、维生素D3
- 主营：黄原胶、大豆分离蛋白、瓜尔胶、酸性蛋白酶厂家、果胶、海藻酸钠、结冷胶、卡拉胶、抗性糊精、可得然胶、明胶、魔芋粉、琼脂、羧甲基纤维素钠、阿斯巴甜、安赛蜜、赤藓糖醇、低聚半乳糖、低聚果糖、低聚木糖、低聚异麦芽糖、核糖、木糖、阿拉伯糖、菊粉、麦芽糖醇
- 主营：黄原胶、维生素C、甘氨酸、蛋白酶、海藻酸钠、维生素B1、精氨酸、赖氨酸、瓜尔胶、维生素、增稠剂
- 主营：氯化胆碱、酵母β葡聚糖、乳清蛋白粉、饲料级酸性蛋白酶厂家、甜菜碱、甜菜碱盐酸盐、维生素A、维生素B1、维生素B2核黄素、维生素B6、维生素D3、维生素E、烟酰胺、鱼油粉、DHA、左旋肉碱酒石酸盐、大豆肽、谷胱甘肽、牛骨胶原蛋白肽、鱼胶原蛋白肽、赤藓糖醇、低聚半乳糖、低聚果糖、低聚木糖、海藻糖、菊粉