Biotin-PEG8-alkyne is a PEG linker containing a biotin group and a terminal alkyne. Biotin is useful for affinity-based applications such as pull-down assays while terminal alkynes are used in copper (I) click chemistry with azide groups on a target molecule. The inclusion of a PEG linker in this molecule improves its solubility in water.
Biotin-PEG8-alkyne is a PEG linker containing a biotin group and a terminal alkyne. Biotin is useful for affinity-based applications such as pull-down assays while terminal alkynes are used in copper (I) click chemistry with azide groups on a target molecule. The inclusion of a PEG linker in this molecule improves its solubility in water.
N-(t-butyl ester-PEG4)-N-bis(PEG4-Propargyl) is a trifunctional PEG linker that combines a t-butyl ester with two terminal alkynes. The alkynes can be applied in copper-click chemistry with azides to form stable triazole linkages with a target molecule, while the t-butyl ester can be deprotected and reacted with amines or alcohols to form amides or esters.
N-(t-butyl ester-PEG4)-N-bis(PEG4-Propargyl) is a trifunctional PEG linker that combines a t-butyl ester with two terminal alkynes. The alkynes can be applied in copper-click chemistry with azides to form stable triazole linkages with a target molecule, while the t-butyl ester can be deprotected and reacted with amines or alcohols to form amides or esters.
Listeria monocytogenes have emerged as significant foodborne pathogens that pose a serious public health problem. As the causative agent of Listeriosis, L. monocytogenes has the highest rate of fatality rate among all foodborne pathogens. L. monocytogenes is a facultatively intracellular, Gram-positive bacterium that could survive high and low temperatures, low pH. It is a rare causative agent of mastitis in cow. However, due to its ability to resist various food processing technologies as well as to grow at low temperature, L. monocytogenes is know to be associated with both raw and pasteurized milk, as well as dairy products such as cheese. As little as 1000 organisms may cause the disease with pregnant, new-born, and immunocompromised individuals the most susceptible.
Listeria monocytogenes TaqMan PCR Kit, 24 reactions
Figure 1 / 3
Click for expanded view
Storage Conditions
The Listeria monocytogenes TaqMan PCR Kit Dx is shipped on dry ice. The components of the kit should be frozen upon arrival. If one or more of the components is not frozen when the kit is received, or if any of the components have been compromised during shipment, please contact Norgen Biotek for assistance. All kit components should be stored at -20°C upon arrival. Repeated thawing and freezing (> 3 x) of the Master Mix and Positive Control should be avoided, as this may affect the performance of the assay. If the reagents are to be used only intermittently, they should be frozen in aliquots.
| Component | Cat. DxTM30400 (24 rxns) |
|---|---|
| MDx TaqMan 2X PCR Master Mix Dx | 550 µL |
| L. monocytogenes Primer Mix Dx | 2 x 70 µL |
| L. monocytogenes Positive Control Dx – 200,000 copies/μL | 50 µL |
| Nuclease-Free Water | 2 x 1.25 mL |
| Product Insert | 1 |
This kit provides a rapid spin column method for the purification of total DNA from a broad spectrum of bacteriophages propagated in bacteria grown in liquid cultures. The DNA is isolated without the use of phenol, chloroform or cesium chloride banding procedures. The spin-column based procedure is rapid and can be completed in less than 45 minutes. The kit is highly efficient for processing small volumes of phage supernatant (500 µL – 1 mL) and with the optional DNase and Proteinase K treatments phage DNA yields are maximized while host DNA contamination is minimized. Purified total phage DNA is of the highest integrity, and can be used in a number of downstream applications including PCR, qPCR, Restriction Fragment Length Polymorphism (RFLP), sequencing, cloning, Southern Blot and more.
Figure 1 / 2
Click for expanded view
| Kit Specifications | |
| Column Binding Capacity | 50 µg |
| Maximum Column Loading Volume | 650 µL |
| Size of DNA Purified | All sizes |
| Maximum Amount of Starting Material | 1 x 1010 pfu/mL enriched phages |
| Average Yield* | 3-15 µg DNA from 106-1010 pfu/mL of enriched phages |
| Time to Complete 10 Purifications | 45 minutes |
* Average yields will vary depending upon a number conditions used and developmental stage.
Storage Conditions and Product Stability
All solutions should be kept tightly sealed and stored at room temperature. This kit is stable for 1 year after the date of shipment.
| Component | Cat. 46800 (50 preps) | Cat. 46850 (100 preps) |
|---|---|---|
| Lysis Buffer B | 40 mL | 2 x 40 mL |
| Wash Solution A | 38 mL | 2 x 38 mL |
| Elution Buffer B | 8 mL | 2 x 8 mL |
| Spin Columns | 50 | 100 |
| Collection Tubes | 50 | 100 |
| Elution Tubes (1.7 mL) | 50 | 100 |
| Product Insert | 1 | 1 |
