DBCO-PEG4-acid is an analog of DBCO-Acid with PEG linker and a DBCO group. The DBCO groups is commonly used for copper-free Click Chemistry reactions due to its strain promoted high energy. The hydrophilic PEG chain allows for increased water solubility. The terminal carboxylic acid can react with primary amine groups in the presence of activators (e.g. EDC, or HATU) to form a stable amide bond. Reagent grade, for research purpose. Please contact us for GMP-grade inquiries.
DBCO-PEG4-acid is an analog of DBCO-Acid with PEG linker and a DBCO group. The DBCO groups is commonly used for copper-free Click Chemistry reactions due to its strain promoted high energy. The hydrophilic PEG chain allows for increased water solubility. The terminal carboxylic acid can react with primary amine groups in the presence of activators (e.g. EDC, or HATU) to form a stable amide bond. Reagent grade, for research purpose. Please contact us for GMP-grade inquiries.
Bacillus cereus is a rod-shaped, gram-positive bacterium. Some strains of B. cereus cause foodpoisoning and other diseases such as keratitis. B. cereus grows at a wide range of temperature, from 4°C to 37°C. In fact, many foodborne illnesses caused by B. cereus are a consequence of improperly cooked or improperly stored food, including dairy products and meats. The majority of food poisoning by B. cereus could be divided into two types of symptoms – the emetic type and the diarrheal type, both of which are caused by the enterotoxin produced by the bacteria.
Bacillus cereus TaqMan PCR Kit,
100 reactions
Bacillus cereus TaqMan PCR Probe/Primer Set and Controls,
100 reactions
Figure 1 / 3
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Storage Conditions and Product Stability
All kit components can be stored for 2 years after the date of production without showing any reduction in performance.
All kit components should be stored at -20°C upon arrival.
| Component | Cat. TM36950 (100 preps) | Cat. TM36910 (100 preps) |
|---|---|---|
| MDx TaqMan 2X PCR Master Mix | 2 x 700 μL | – |
| Bacillus cereus Primer & Probe Mix | 280 μL | 280 μL |
| Bacillus cereus Positive Control | 150 μL | 150 μL |
| Nuclease-Free Water (Negative Control) | 1.25 mL | 1.25 mL |
| Product Insert | 1 | 1 |
Biocolor’s Purple-Jelley assay kit is the perfect tool for accurate measurement of hyaluronic acid / Hyaluronan levels in your samples. This colorimetric assay is optimised for quantitative analysis in-vivo, tissue-derived hyaluronic acid / Hyaluronan and includes full step-by-step instructions.
Colorimetric Detection (655nm) (Endpoint)
Hyaluronic acid, in its hydrated form, is a unique carbohydrate polymer, often referred to as a ‘gentle giant.’ It consists of a lengthy, flexible, non-branching chain with a repeating disaccharide pattern. This disaccharide is composed of alternating uronic acid and aminosugar units.
Discovering the J-Aggregate Effect in Cyanine DyesIn 1936, Edwin Jelley made a fascinating observation, documented it in a letter to Nature (Nature 138, 1009 – 1010). He noted a peculiar behaviour of certain cyanine dyes, that when dissolved in 5 M NaCl, they dyes exhibited a third absorbance peak at a longer wavelength, around 650nm. In deionized water, however, they displayed only a double peak at approximately 540nm and 570nm. The 650nm peak in concentrated dye solutions resulted from the aggregation of dye molecules and was later termed a ‘J-aggregate,’ in honor of Edwin Jelley. The J-aggregate is known as a supra-molecular complex, formed by stacking individual dye molecules.
Subsequent research in the 1960s, notably by Kay et al. (J. Physical Chem. 68, 1896 – 1906), revealed that various biological polymers, including proteins, DNA, polar lipids, and glycosaminoglycans, could also induce this third absorbance peak. This phenomenon led to the development of the Purple-Jelley assay, named after the purple color of the dye reagent and Edwin Jelley himself.
During the assay, hyaluronic acid is selectively purified during the assay sample preparation protocol. This is then reacted with the Purple-Jelley dye reagent, and the absorption of the characteristic third wavelength recorded. By comparison with a calibration curve the hyaluronic acid content of the sample can be measured.
Step 1. The assay protocol takes tissue samples through a sequential sample preparation protocol which involves enzymatic protein digestion, followed by precipitation and purification of GAGs, culminating in the precipitation of purified Hyaluronic acid.
Step2. The processed sample is then incubated for 10 minutes with the Purple-Jelley dye reagent, forming a coloured product which can be measured spectrophotometrically.
Step 3. The Hyaluronic acid content of unknown samples can be calculated by comparison against a calibration curve prepared using a standard comprising hyaluronic acid (supplied with the kit).
10 – 100µg/ml
10µg/ml
Colorimetric Detection (655nm) (Endpoint)
100 in total (allows a maximum of 46 samples to be run in duplicate alongside a standard curve).
In-vivo: Hyaluronic acid purified from in-vivo tissues. The kit protocol involves extraction and purification of hyaluronic acid prior to reaction with the Purple-Dye reagent.
This kit is designed for research use only. Not for use in diagnostic procedures.
Kit requires access to a centrifuge, as well as a spectrophotometer/colorimeter capable of colorimetric, absorbance detection at 655nm.
Specific sample preparation protocols may require customer to provide further reagents, consult assay manual for further information.
Mode of ActionAssay SpecificationsKit Contents
1. Purple-Jelley Dye Reagent (1x 20ml)
2. Hyaluronan Reference Standard (1x 5ml, 0.2mg/ml soluble Hyaluronic Acid)
3. Precipitating Reagent (2x 34ml)
4. Sodium Chloride (1x 20ml)
5. Cetylpyridinium Chloride (1x 20ml)
6. TRIS-buffered Saline (5x tablets)
7. 2ml screw-cap tubes for preparation of samples.
8. Assay kit manual
NB: Additional reagents may be required for sample preparation prior to assay. Consult manual or contact us for further details.
Biocolor’s Purple-Jelley assay kit is the perfect tool for accurate measurement of hyaluronic acid / Hyaluronan levels in your samples. This colorimetric assay is optimised for quantitative analysis in-vivo, tissue-derived hyaluronic acid / Hyaluronan and includes full step-by-step instructions.
Product Description
Highly Sensitive Isothermal Amplification Kit with Fast Reaction Time
Kit Storage and term of Validity
Storage term: stored at ≤-20℃,keep away from light, avoid heavy weight and repeated freezing and thawing.
Term of Validity: 14 months
Isothermal nucleic acid Principle Summary
This kit is based on a rapid nucleic acid amplification technology at room temperature and constant temperature: at room temperature and constant temperature (generally 39 ºC~42 ºC), reverse transcriptase uses specific primers and template RNA to synthesize cDNA strands, and binds the auxiliary protein and single strand With the help of the protein, the recombinase and the primer form a complex; perform a homology search and bind the target homology domain, at this time a D-loop region is formed at the homology position and strand exchange begins; accompanied by the recombinase from the complex Upon dissociation, the polymerase also binds to the 3′ end of the primer, initiating chain extension. Relying on the action of nfo enzyme, adding specific molecular probes designed according to the template, and using colloidal gold technology (sandwich method) can detect the final result.
Isothermal nucleic acid Product Features
1/ High sensitivity and specificity, short reaction time.
2/ The reagent form is freeze-dried, stable and easy to operate.
3/ The reaction can be operated by metal bath and water bath pot without purchasing expensive PCR apparatus.
Technical Parameters:
| Parameters | Details |
|---|---|
| Product Name | RNA Isothermal Amplification Kit NFO |
| Manufacturer | Amp-future |
| Storage Temperature | -20°C |
| Kit Components | Enzymes, Buffers ,Reagents |
| Packaging | 48 Tests/box |
| Detection Limit | 500-1000copies/µL |
| Shipping | ICE |
| Test Time | 5-20mins |
Isothermal nucleic acid Applications
Suitable for RNA isothermal rapid amplification kit(NFO type)
Primer: Require pair of nucleotide primers with the length of 25-35 bp.
RNA NFO kit reaction temperature is 39 to 42℃ and time is 5-20 minutes.
Notes
1/ Please avoid nucleic acid contamination and set blank control during reaction due to the high sensitivity of the kit.
2/ Please take out the required quantity of MIRA reaction units for the experiment, and put the rest under storage conditions when performing the experiment.
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Tel : 081-875-1869 , 02-328-7179
Email : [email protected]
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