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名称
β-淀粉酶
别名
1,4-α-D-葡聚糖麦芽水解酶
英文别名
β-Amylase from sweet potato
货号
A419518-100g
包装规格
100g
级别
EnzymoPure™
浓度
≥700000 units/g,来源于红薯
产品介绍
基本信息 活性最适 pH :5.0-5.6 (activity range of 3.0-6.5) 最高活性温度:55-60℃ (activity range of below 60℃) 单位活性定义: 1g酶粉,在pH 5.5, 60℃的条件下,每小时水解1.10%淀粉液,形成的麦芽糖mg数为1个酶活力单位,以u/g表示。 应用 β -淀粉酶来源于红薯,可用于水解 α-连接的多糖(例如淀粉和糖原)α连接键、广泛用于啤酒、高麦芽糖结晶麦芽糖醇等以麦芽糖为产物或中间产物的制糖。 生化/生理作用 β-淀粉酶作用于淀粉时,从糖链的非还原端开始,以一个麦芽糖为单位,切断α-l,4-糖苷键,并且使麦芽糖的构型从α型转化为β型,也即得到的是β-麦芽糖。该酶不能水解淀粉分支处的α-l,6-糖苷键,淀粉的分解会在1.6键前的2-3个葡萄糖残基处停止,因此产生的麦芽糖基本上无葡萄糖产生;此外,凭借高稳定性,来自红薯的β-淀粉酶可与琼脂糖微球一起用于固定化酶制剂中。 使用方法 最佳糖化条件取决于糖化时间、pH、温度、底物和酶制剂加量,一般建议使用方法如下: 1. 在麦芽糖浆酿造中,0.1-0.3L/t干基,最适作用条件下,糖化12-30小时; 2. 在啤酒酿造中,0.1-0.3L/t干基,最适作用条件下,糖化0.5-1.0小时; 3. 高麦芽糖浆(>70%),需要与普鲁兰酶协同糖化。建议使用方法,β-淀粉酶0.5-1.0/L干基,普鲁兰酶0.5-1.0/L干基(酶活力以1千单位计),糖化24小时; 4. 超高麦芽糖浆(>90%),需要与普鲁兰酶协同糖化。建议使用方法,β-淀粉酶1.5-2.0/L干基,普鲁兰酶1.5-2.8/L干基(酶活力以1千单位计),糖化24小时后加入麦芽三糖醇酶1.5-2.0/L干基,继续糖化24小时;
Merck Index
599
Safety
「No Dangerous Attributes」
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Research chemical 100g

Research chemical 100g; supplied for laboratory research, analysis, inspection, and scientific procurement use; specifications: 100g.

item number:A419518-100g
Product model:100g
level: 100g
Lead Time:30days
sold 550 Items
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