Biotin-PEG2-alkyne

Description 

AccuBand™ 100 bp DNA Ladder II is composed of 10 individual DNA fragments, presenting 1k, 900, 800, 700 600, 500, 400, 300, 200 and 100 bp sharp bands respectively. This product contains 1 enhanced band (500 bp) for easy identification of bands. AccuBand™ 100 bp DNA Ladder II is ready-to-use, containing loading buffer with dual color tracking dyes (orange G and Xylene cyanol FF). AccuBand™ 100 bp DNA Ladder II provides a sufficient amount of DNA for clear observation of all DNA bands ranging from 100 bp to 1 kb, either in agarose gel or in polyacrylamide gel electrophoresis. 

Features

• Sharp bands
• Suitable for polyacrylamide gel electrophoresis
• Quick reference— enhanced bands 
• Ready-to-use— premixed with loading dye for direct loading
• Stable— room temperature storage over 6 months

Source 

Phenol extracted PCR products and dsDNA digested with specific restriction enzymes, equilibrated in 10 mM Tris-HCl (pH 8.0) and 10 mM EDTA.

Range 

100 ~ 1,000 bp 

Concentration 

50 µg/ 500 µl 

Recommended loading volume 

5 µl/ well

Storage

Room temperature for 6 months
4°C for 12 months 
-20°C for 36 months 

endo-BCN-PEG3-acid is a click chemistry linker consisting of a BCN group with a terminal carboxylic acid. The terminal carboxylic acid can react with primary amine groups in the presence of activators (e.g. EDC, or HATU) to yield a amide bond. The BCN group can react with azide-tagged biomolecules. The hydrophilic PEG spacer increases solubility in aqueous media. Reagent grade, for research purpose. Please contact us for GMP-grade inquiries.

endo-BCN-PEG3-acid is a click chemistry linker consisting of a BCN group with a terminal carboxylic acid. The terminal carboxylic acid can react with primary amine groups in the presence of activators (e.g. EDC, or HATU) to yield a amide bond. The BCN group can react with azide-tagged biomolecules. The hydrophilic PEG spacer increases solubility in aqueous media. Reagent grade, for research purpose. Please contact us for GMP-grade inquiries.

Description

Escherichia coli is one of many species of bacteria living in the lower intestines of mammals, known as gut flora. When located in the large intestine, it assists with waste processing, vitamin K production, and food absorption. Discovered in 1885 by Theodor Escherich, a German pediatrician and bacteriologist, E. coli are abundant: the number of individual E. coli bacteria in the faeces that a human defecates in one day averages between 100 billion and 10 trillion. However, the bacteria are not confined to the environment, and specimens have also been located, for example, on the edge of hot springs. The E. coli strain O157:H7 is one of hundreds of strains of the bacterium that causes illness in humans.

E. coli are unable to sporulate. Thus, treatments which kill all active bacteria, such as pasteurization or simple boiling, are effective for their eradication, without requiring the more rigorous sterilization which also deactivates spores. As a result of their adaptation to mammalian intestines, E. coli grow best in vivo or at the higher temperatures characteristic of such an environment, rather than the cooler temperatures found in soil and other environments.

The enteric E. coli (EC) are divided on the basis of virulence properties into enterotoxigenic (ETEC – causative agent of diarrhea in humans, pigs, sheep, goats, cattle, dogs, and horses), enteropathogenic (EPEC – causative agent of diarrhea in humans, rabbits, dogs, cats and horses); enteroinvasive (EIEC – found only in humans), verotoxigenic (VTEC – found in pigs, cattle, dogs and cats); enterohaemorrhagic (EHEC – found in humans, cattle, and goats, attacking porcine strains that colonize the gut in a manner similar to human EPEC strains) and enteroaggregative E. coli (EAggEC – found only in humans).

E. coli O157:H7 was first recognized as a pathogen as a result of an outbreak of unusual gastrointestinal illness in 1982. The outbreak was traced to contaminated hamburgers, and the illness was similar to other incidents in the United States and Japan. The etiologic agent of the illness was identified as a rare O157:H7 serotype of Escherichia coli in 1983. This serotype had only been isolated once before, from a sick patient in 1975.

Exceptional value for money
Rapid detection of all clinically relevant subtypes
Positive copy number standard curve for quantification
Highly specific detection profile
High priming efficiency
Broad dynamic detection range (>6 logs)
Sensitive to < 100 copies of target Accurate controls to confirm findings