Propargyl-PEG3-acid is a reagent with an alkyne group and a carboxylic acid. The terminal carboxylic acid can form amide bond with primary amines (activation is needed). The alkyne can form triazole linkage with azide containing molecules via copper catalyzed reactions. Reagent grade, for research purpose. Please contact us for GMP-grade inquiries.
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Propargyl-PEG3-acid is a reagent with an alkyne group and a carboxylic acid. The terminal carboxylic acid can form amide bond with primary amines (activation is needed). The alkyne can form triazole linkage with azide containing molecules via copper catalyzed reactions. Reagent grade, for research purpose. Please contact us for GMP-grade inquiries.
Reagent technology of protein/enzyme system: freeze-dried powder, freeze-dried microspheres
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This kit is based on a rapid nucleic acid amplification technology at room temperature and constant temperature: at room temperature and constant temperature (generally 39ºC~42ºC), with the help of auxiliary proteins and single-strand binding proteins,the recombinase and primers form a complex; Source search and combine the target homology domain, at this time, a D-loop region is formed at the homology position and strand exchange begins;along with the dissociation of the recombinase from the complex,the polymerase also binds to the 3′ end of the primer and begins chain extension.It is suitable for laboratory-level DNA amplification and DNA amplification for other detection purposes.
Cytokeratin 19 (CK19) forms intermediate filaments found in the intracytoplasmic cytoskeleton of epithelial tissue and provides mechanical support. Anti-Cytokeratin 19 stains epithelia and epithelial malignancies such as carcinomas of the colon, stomach, pancreas, biliary tract, liver, and breast. Cytokeratin 19 is a useful marker for distinguishing hepatocellular carcinoma from intrahepatic cholangiocarcinoma. This differentiation is improved when stained in combination with Cytokeratin 7, CAM5.2l, Ber-EP4/MOC31, HepPar1 and TTF1. Cytokeratin 19 staining can also be used to recognize thyroid papillary carcinomas.
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.