- 中文名称
GAL | β半乳糖苷酶
- 英文名字
- GAL | Beta galactosidase
- 供应商
- Agrisera
- 产品货号
- AS20-4515
- 产品报价
- ¥询价/200ug
- 产品说明书
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- 购买方式
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- 产品新闻
- 背景资料
- Beta-galactosidase is an exoglycosidase which hydrolyzes the β-glycosidic bond formed between agalactose and its organic moiety. It may also cleave fucosides and arabinosides but with much lower efficiency. It is an essential enzyme in the human body. Deficiencies in the protein can result ingalactosialidosis or Morquio B syndrome. In E. coli , the gene of β-galactosidase, the lacZ gene, is present as part of the inducible system lac operon which is activated in the presence of lactose when glucose level is low. It is commonly used in molecular biology as a reporter marker to monitor gene expression. It also exhibits a phenomenon called α-complementation which forms the basis for the blue/white screening of recombinant clones. This enzyme can be split in two peptides, LacZα and LacZΩ, neither of which is active by itself but when both are present together, spontaneously reassemble into a functional enzyme. This property is exploited in many cloning vectors where the presence of the lacZα gene in a plasmid can complement in trans another mutant gene encoding the LacZΩ in specific laboratory strains of E. coli . However, when DNA fragments are inserted in the vector, the production of LacZα is disrupted, the cells therefore show no β-galactosidase activity. The presence or absence of an active β-galactosidase may be detected by X-gal, which produces a characteristic blue dye when cleaved by β-galactosidase, thereby providing an easy means of distinguishing the presence or absence of cloned product in a plasmid. E. coli β-Galactosidase consists of 1,024 amino acids with molecular mass of 116 kDa and functional form is a homotetramer.
- 应用类型
- ELISA (ELISA), Immunofluorescence (IF), Immunoprecipitation (IP), Western blot (WB)
- 免疫原
- Full length Beta galactosidase from E.coli UniProt: B7UJI9
- 来源宿主
- 兔
- 反应性
- Beta galactosidase (E.coli) and beta galactosidase tagged proteins
- 保存建议
- Store at -20
- 其他
- Agrisera公司提供1000种用于植物和藻类细胞生物学研究的一抗,2000多种二抗。Agrisera公司提供的植物领域的抗体涵盖拟南芥、莱茵衣藻、蓝藻、松柏类、硅藻、大豆、大麦、蒺藜苜蓿、烟草、稻、菜豆、小立碗藓、杨树、豌豆、番茄、马铃薯、菠菜、小麦、玉米、葡萄等多个物种,此外还有水生生物类(藻类、鱼)抗体,细菌、昆虫、真菌抗体。针对植物蛋白质的保守氨基酸序列,Agirsera还独家开发了数十种通用抗体(global antibodies),这类抗体几乎可以与所有的高等植物及藻类产生免疫反应,可为研究人员提供极为方便的选择。
- 注意
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