计算溶液所需的质量、体积或浓度。
X-Gal是β-半乳糖苷酶(β-galactosidase)的惰性发色底物,本身无颜色,在β-半乳糖苷酶的催化作用下,可水解产生无色的半乳糖和4-氯-3-溴-靛蓝,后者会形成深蓝色沉淀,便于肉眼观察或仪器检测。IPTG可诱导lacZ基因表达,进而促使β-半乳糖苷酶催化X-Gal水解,形成蓝色菌落。常用于β-半乳糖苷酶的原位染色检测以及蓝白斑筛选。
主要应用
蓝白斑菌落筛选:用于区分重组菌落(白色)与非重组菌落(蓝色),是分子克隆中常用的筛选方法。
真核细胞检测:可实现转染真核细胞中β-半乳糖苷酶报告基因表达的可视化,直观反映报告基因的表达情况。
活性检测:用于免疫学和组织化学程序中β-半乳糖苷酶活性的检测,助力相关分子机制研究。
操作步骤(仅供参考)
按实验具体要求操作。
注意事项
1. 溶液储存及使用过程中,避免反复冻融,以免影响产品活性及稳定性。
2. 为保障实验人员的安全与健康,操作时请穿戴实验服,并佩戴一次性手套,避免皮肤直接接触。
X-Gal is an inert chromogenic substrate for β-galactosidase. It is colorless itself, but upon hydrolysis by β-galactosidase, it produces colorless galactose and 4-chloro-3-bromo-indigo, which forms a deep blue precipitate, facilitating visual observation or instrument detection. IPTG can induce the expression of the lacZ gene, thereby promoting the hydrolysis of X-Gal by β-galactosidase, resulting in the formation of blue colonies. It is commonly used for in situ staining detection of β-galactosidase and for blue-white screening.
Main Applications
Blue-White Colony Screening: Used to distinguish recombinant colonies (white) from non-recombinant colonies (blue). It is a commonly used screening method in molecular cloning.
Eukaryotic Cell Detection: Enables visualization of β-galactosidase reporter gene expression in transfected eukaryotic cells, providing a direct reflection of reporter gene expression levels.
Activity Assay: Used for detecting β-galactosidase activity in immunological and histochemical procedures, aiding research into related molecular mechanisms.
Instructions (For Reference Only)
Operate according to the specific requirements of the experiment.
Precautions
During storage and use of the solution, avoid repeated freeze-thaw cycles to prevent affecting product activity and stability.
To ensure the safety and health of experimental personnel, please wear a laboratory coat and disposable gloves during operation to avoid direct skin contact.
H315: 引起皮肤刺激
H319: 引起严重眼睛刺激
H335: 可能引起呼吸道刺激
H302: 吞食有害
P261: 避免吸入灰尘/烟雾/气体/雾/蒸汽/喷雾
P280: 戴防护手套/穿防护服/戴防护眼罩/戴防护面具。
P302+P352: 如皮肤沾染:用水充分清洗。
P321: 特殊处理(请参阅此标签上的...)。
P501: 将内容物/容器送到批准的废物处理厂处理
P264: 处理后要彻底洗手。
P271: 仅在室外或通风良好的地方使用。
P270: 使用本产品时,请勿进食、饮水或吸烟。
P304+P340: 如误吸入:将人转移到空气新鲜处,保持呼吸舒适体位。
P362+P364: 脱掉沾污的衣服,清洗后方可重新使用。
P330: 漱口
P301+P317: 如果被吞咽:请寻求医疗帮助。
P317: 寻求紧急医疗救助。
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| 批号(Lot Number) | 证书类型 | 货号 |
|---|---|---|
| 分析证书 | X1520260 | |
| 分析证书 | X1520260 | |
| 分析证书 | X1520260 | |
| 分析证书 | X1520260 |