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一般說明
ββ-半乳糖苷酶属于糖苷水解酶clan A(GH-A)家族的一员，广泛存在于包括原核生物和真核生物的微生物中。
應用
β-半乳糖苷酶（来源于米曲霉Aspergillus oryzae）已用于：
- 体外核磁共振(NMR)
- 作为β-半乳糖苷酶分析标准品，测定细胞相关的β-半乳糖苷酶浓度
- 修饰突变滑液细胞(slime cell)表面的糖残基以研究粘附性
- 乳糖酶促水解实验
- 反相(RP)吸附实验
- 乳清乳糖水解
生化／生理作用
ββ-半乳糖苷酶作用于二糖、糖缀合物和多糖末端的β-D-半乳糖基。它可用于介导转糖基反应，比如低聚半乳糖(GOS)合成。ββ-半乳糖苷酶可用于糖生物学和生物技术应用。
β-半乳糖苷酶切割乳糖成单糖成分，葡萄糖和半乳糖。它还能催化葡萄糖转糖基化形成异乳糖，在反馈回路中作为β-半乳糖苷酶的诱导剂。
單位定義
一单位每分钟水解1.0 μmole乳糖，pH4.5,30℃。
基底
儲存類別代碼
11 - Combustible Solids
水污染物質分類（WGK）
WGK 3
閃點（°F）
Not applicable
閃點（°C）
Not applicable
個人防護裝備
Eyeshields, Gloves, type N95 (US)
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