E. coli O157:H7 is a rod-shaped, gram negative bacterium. It is an enterohemorrhagic strain of the common E. coli bacterium and infection by the O157:H7 strain is commonly associated with hemorrhagic colitis. E. coli O157:H7 is recognized by its somatic (cell wall) antigen (O157) and its flagella antigen (H7). In addition, E. coli O157:H7 is known to produce Shiga-like toxins, which cause severe symptoms. While most patients can recover from the infection, up to 15% of the patients may develop hemolytic uremic syndrome, a type of kidney failure that could be fatal. Infection of E. coli O157:H7 usually results from consumption of poorly prepared food including undercooked meat (particularly ground beef), untreated water or raw unpasteurized milk.
Norgen’s E. coli O157:H7 Quantified Bacterial DNA Standards are cloned fragments of the two Shiga-like toxin regions purified using Norgen’s sample preparation technology. They include partial sequences of STX-1 subunit A gene and STX-2 subunit A gene. Please refer to Appendix A for sequence information. The purified DNA is quantified vigorously using multiple methods including spectrophotometry, gel densitometry and real-time PCR. It is intended to be used as positive controls or PCR quantification standards for E. coli O157:H7. This product is compatible with Norgen Biotek’s E. coli O157:H7 Taqman PCR Detection Kit (Cat. TM41350) and E. coli O157:H7 Taqman PCR Detection Probe/Primer and Control Set (Cat. TM41310).
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| Volume Provided | 250 μL (for STX1)250 μL (for STX2) |
| DNA Quantity | 2 x 104 copies per μL |
Storage Conditions
Upon receipt, store Norgen’s E. coli O157:H7 Quantified Bacterial DNA Standards at -20°C or lower. Avoid multiple freeze-thaw cycles. If needed, prepare smaller working aliquots and store at -20°C or lower.
This product provides a reliable solution for DNA isolation from yeast samples. Total DNA can be purified from yeast (<5x 107) without phenol or chloroform. The whole extraction can be finished within 60 minutes. Purified DNA can be directly used for PCR, Southern blot, ect.
Specifications
| Features | Specifications |
| Main Functions | Isolation total DNA from yeast cultures |
| Applications | PCR, southern blot and enzyme digestion, etc. |
| Purification method | Mini spin column |
| Purification technology | Silica technology |
| Process method | Manual (centrifugation or vacuum) |
| Sample type | Yeast culture |
| Sample amount | Bacterial culture: 1-1.5 ml |
| Elution volume | ≥30μl |
| Time per run | ≤60 minutes |
| Liquid carrying volume per column | 800μl |
| Binding yield of column | 100μg |
This product is based on silica Column purification. The sample is lysed and digested with lysate and protease, DNA is released into the lysate. Transfer to an adsorption column. Nucleic acid is adsorbed on the membrane, while protein is not adsorbed and is removed with filtration. After washing proteins and other impurities, Nucleic acid was finally eluted with low-salt buffer (10mm Tris,pH9.0, 0.5mm EDTA).
Kit Contents
| Contents | D314702 | D314703 |
| Purification Times | 50 Preps | 250 Preps |
| Hipure DNA Mini Columns I | 50 | 250 |
| 2ml Collection Tubes | 50 | 250 |
| Glass Beads (0.4~0.6mm) | 20 g | 90 g |
| Buffer SE | 30 ml | 150 ml |
| Lyticase | 1.8 ml | 5 x 1.8 ml |
| Buffer ATL | 30 ml | 150 ml |
| ReagentDX | 500 μl | 1500 μl |
| Buffer DL | 30 ml | 150 ml |
| Buffer GW1* | 13 ml | 66 ml |
| Buffer GW2* | 20 ml | 2 x 50 ml |
| Proteinase K | 12 mg | 60 mg |
| Protease Dissolve Buffer | 1.8 ml | 5 ml |
| Buffer AE | 15 ml | 30 ml |
Storage and Stability
Proteinase K should be stored at 2–8°C upon arrival. However, short-term storage (up to 12 weeks) at room temperature (15–25°C) does not affect their performance. The remaining kit components can be stored dry at room temperature (15–25°C) and are stable for at least 18 months under these conditions. Buffer ATL may precipitate at low temperature. Dissolve it by 37℃ water bath.
This product provides a reliable solution for DNA isolation from yeast samples. Total DNA can be purified from yeast (
Propargyl-PEG24-amine is a linker with 24 PEG units. The amine group is reactive with carboxylic acids, activated NHS esters, carbonyls (ketone, aldehyde) etc. The propargyl group is reactive with azide compounds under the catalyzation of copper. This linker has pretty good water-solubility due to its long PEG chain. Reagent grade, for research purpose. Please contact us for GMP-grade inquiries.
Propargyl-PEG24-amine is a linker with 24 PEG units. The amine group is reactive with carboxylic acids, activated NHS esters, carbonyls (ketone, aldehyde) etc. The propargyl group is reactive with azide compounds under the catalyzation of copper. This linker has pretty good water-solubility due to its long PEG chain. Reagent grade, for research purpose. Please contact us for GMP-grade inquiries.