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In Stock Series | Chromogenic Substrates for α-D-Galactosidase: Precisely Target Enterococcus and Other Indicator Microbes
2026/1/7 16:22:38 Browse volume(39)α-D-Galactosidase
α-D-Galactosidase is a characteristic marker enzyme for microorganisms such as Enterococcus, widely used in the fields of chromogenic media, water quality testing, and food safety testing. GeneSeqTools Bioscience & Technology provides high-purity, readily available series of α-D-galactosidase chromogenic substrates including X-α-Gal, Salmon-α-Gal, Magenta-α-Gal , covering three color systems: blue, pink, and magenta/purple-red, meeting the development needs of single-indicator or multiplex chromogenic media. Ready for immediate shipment with highly competitive pricing.
α-D-Galactosidase is an exoglycosidase capable of catalyzing the hydrolysis of α-D-galactosidic bonds. In the field of microbiology, this enzyme is widely present in the genus Enterococcus, Salmonella, Klebsiella, and some Escherichia coli. Due to its highly specific expression in certain bacterial genera, α-D-galactosidase activity detection has become one of the "gold standards" for modern microbial chromogenic identification. Through specific chromogenic substrates, direct visual interpretation of target colonies can be achieved, eliminating the need for cumbersome biochemical confirmation steps.
α-D-Galactosidase chromogenic substrates are composed of an indolyl group connected to α-D-galactose via a glycosidic bond. Under the action of α-D-galactosidase produced by bacteria, the glycosidic bond in the substrate molecule is specifically hydrolyzed, releasing the indolyl group. The released indolyl group undergoes oxidative dimerization in air, rapidly forming a visible, water-insoluble colored precipitate.
1.X-α-Gal
Chinese Name: 5-Bromo-4-chloro-3-indolyl α-D-galactopyranoside
English Name: 5-Bromo-4-chloro-3-indolyl α-D-galactopyranoside
Abbreviation: X-α-Gal
CAS No.: 107021-38-5
Molecular Formula: C14H15BrClNO6
Molecular Weight: 408.63
Specification: 1 g / 25 g / 100 g (Custom packaging supported)
Form: Lyophilized powder
Catalog No.: G01010004
Stock: In stock
Color Developed: Blue
Application: Used for enzyme activity detection in microbiological testing, especially suitable for screening bacteria such as Enterococcus.
2.Salmon-α-Gal
Chinese Name: 6-Chloro-3-indolyl α-D-galactopyranoside
English Name: 6-Chloro-3-indolyl α-D-galactopyranoside
Abbreviation: Salmon-α-Gal
CAS No.: 198402-61-8
Molecular Formula: C14H16ClNO6
Molecular Weight: 329.73
Specification: 1 g / 25 g / 100 g (Custom packaging supported)
Form: Lyophilized powder
Catalog No.: G01030004
Stock: In stock
Color Developed: Salmon Red
Application: Suitable for applications such as Enterococcus detection and microbial screening, facilitating rapid determination of bacterial activity through chromogenic reactions.
3.Magenta-α-Gal
Chinese Name: 5-Bromo-6-chloro-3-indolyl α-D-galactopyranoside
English Name: 5-Bromo-6-chloro-3-indolyl α-D-galactopyranoside
Abbreviation: Magenta-α-Gal
CAS No.: 198402-60-7
Molecular Formula: C14H15BrClNO6
Molecular Weight: 408.63
Specification: 1 g / 25 g / 100 g (Custom packaging supported)
Form: Lyophilized powder
Catalog No.: G01020004
Stock: In stock
Color Developed: Magenta / Purple-red
Application: Widely used in fields such as water quality testing and food safety testing, providing reliable microbial screening solutions.
1. Chromogenic Media
Selective detection of microorganisms, detecting bacteria that produce α-D-galactosidase, allowing direct interpretation through color change.
2. Enterococcus Detection
Screening and identification of Enterococcus genus. Most Enterococcus species produce α-galactosidase, making it a classic target enzyme.
3. Water Quality Testing
Microbial monitoring of drinking/environmental water, detecting fecal pollution indicator bacteria.
4. Food Safety Testing
Screening of foodborne pathogens, microbiological testing of foods such as dairy products and meat.
✅ Ready Stock: Ample inventory of three products in various specifications, shortening your project waiting time.
✅ Price Advantage: Higher cost-effectiveness compared to imported brands, reducing R&D and production costs.
✅ Stable Quality: High-purity raw materials, strict quality control standards, ensuring batch-to-batch consistency and reliable experimental results.
✅ Three Color Options: Blue/pink/red three chromogenic colors, meeting the needs of single or multiplex detection systems.
Extended Services
Enzymatic cleavage and color development, clear at a glance – the gold standard substrate for α-galactosidase detection.
For more chromogenic substrates or custom packaging services, please call +86 13302967066!
GeneSeqTools Bioscience & Technology focuses on providing reliable domestic alternative solutions for gene sequencing, molecular diagnostics, and microbiological detection.
For related products such as blood cell dyes and buffer salts, you can view the complete product line and technical specifications on the 【MedSun Biotechnology Website】.
Founded in 2015, it is a high-tech enterprise focusing on microbial testing、 gene sequencing and in vitro molecular diagnostics in the R&D, production, and sales of biochemical reagent raw materials. Committed to providing high-quality biochemical reagent raw materials and professional custom synthesis services, the product portfolio covers more than a dozen categories and nearly a thousand innovative products. Upholding the core philosophy of “customer first, integrity and professionalism”, we serve with dedication to meet customers’ diverse needs in research and testing.
Official WeChat account: Shenzhen GeneSeqTools Bioscience & Technology Co. Ltd.
GeneSeqTools official website: http://www.geneseqtools.com
Hotline: +86 0755-23251735
QQ: 2370561481
Email: sales@geneseqtools.com
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