Dde Biotin-PEG4-alkyne is useful for introducing a biotin moiety to azide-containing molecules using Cu(I)-catalyzed Click Chemistry. The hydrophilic spacer arm provides better solubility to the labeled molecules in aqueous media. Dde protecting group allows efficient release of captured biotinylated molecules from streptavidin under mild conditions with hydrazine. Reagent grade, for research purpose. Please contact us for GMP-grade inquiries.
Dde Biotin-PEG4-alkyne is useful for introducing a biotin moiety to azide-containing molecules using Cu(I)-catalyzed Click Chemistry. The hydrophilic spacer arm provides better solubility to the labeled molecules in aqueous media. Dde protecting group allows efficient release of captured biotinylated molecules from streptavidin under mild conditions with hydrazine. Reagent grade, for research purpose. Please contact us for GMP-grade inquiries.
Usages:
For isolating lactose-fermenting Gram-negative enteric bacilli.
Principle:
Peptones are sources of nitrogen and other nutrients. Lactose is a fermentable carbohydrate. When lactose is fermented, alocal pH drop around the colony causes a color change in the pH indicator (neutral red) and bile precipitation. Bile salts,bile salts no. 3, oxgall and crystal violet are selective agents that inhibit growth of gram-positive organisms. Agar is the solidifying agent.
Formulation（per liter）:
| Pancreatic Digest of Gelatin | 17.0 g |
| Peptones (meat and casein) | 3.0 g |
| Lactose Monohydrate | 10.0 g |
| Sodium Chloride | 5.0 g |
| Bile Salts | 1.5 g |
| Agar | 13.5 g |
| Neutral Red | 30.0 mg |
| Crystal Violet | 1 mg |
| Final pH | 7.1±0.2 |
How to use：
1.Suspend 50 g in 1 L of distilled or deionized water. Heat to boiling to dissolve completely. Autoclave at 121°C for 15 minutes.
2.Transfer 1 mL of Soybean–Casein Digest Broth to 100 mL of MacConkey Broth, and incubate at 42 to 44 for 24 to 48 hours. Subculture on a plate of MacConkey Agar at 30 to 35 deg.C for 18 to 72 hours.
Quality control：
| Item | The name and number of strain | PR/G | Reaction |
| Growth rate | E.Coli ATCC8739 | PR≥0.7 | Rose-red |
| Characteristic difference | Proteus mirabilis CMCC(b)49005 | PR≥0.7 | Colorless, no swarming |
| Selective | Staphylococcus aureus ATCC6538 | G≤1 | － |
Storage: Keep container tightly closed, store in a cool, dry place, away from bright light. Storage period of three years.
Specifications: 250g/bottle
250g
DBCO-Acid is a non-activated building block and adds minimal spacer to modified molecules. In the presence of activators such as EDC or HATU, this reagent can be used to derivatize amine-containing molecules through a stable amide bond. DBCO is commonly used for copper-free Click Chemistry reactions. Reagent grade, for research purpose. Please contact us for GMP-grade inquiries.
DBCO-Acid is a non-activated building block and adds minimal spacer to modified molecules. In the presence of activators such as EDC or HATU, this reagent can be used to derivatize amine-containing molecules through a stable amide bond. DBCO is commonly used for copper-free Click Chemistry reactions. Reagent grade, for research purpose. Please contact us for GMP-grade inquiries.
