t-Boc-N-Amido-PEG10-propargyl is a propargyl linker with one side protected by Boc group. The propargyl group can form triazole linkage with azide-bearing compounds or biomolecules via copper catalyzed Click Chemistry. The Boc protected amine can be deprotected under mild acidic conditions.
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t-Boc-N-Amido-PEG10-propargyl is a propargyl linker with one side protected by Boc group. The propargyl group can form triazole linkage with azide-bearing compounds or biomolecules via copper catalyzed Click Chemistry. The Boc protected amine can be deprotected under mild acidic conditions.
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.