Mastitis is the single most costly disease of dairy cattle resulting in the reduction of milk yield and quality. The inflammation of the utter is mainly caused by bacteria, and Staphylococcus aureus (S. aureus) is often considered the most common cause of contagious mastitis in dairy herds. S. aureus infection is estimated to be present in up to 90% of dairy farms and is responsible for 35% of the economic loss in the dairy industry. S. aureus is a facultatively anaerobic, Gram positive bacterium. The majority of S. aureus strains are catalase-positive and coagulase-positive, which forms the basis of traditional identification methodology.
Staphylococcus aureus Quantified Bacterial DNA Standard is prepared from cultured bacteria using Norgen’s sample preparation technology. The purified DNA is quantified vigorously using multiple methods including spectrophotometry, gel densitometry and real-time PCR. It is intended to be used as a positive control or PCR quantification standard for Staphylococcus aureus.
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| Volume Provided | 250 µL |
| DNA Quantity | 2 x 104 copies per µL |
Storage Conditions
Upon receipt, store Norgen’s Staphylococcus aureus Quantified Bacterial DNA Standard at -20oC or lower. Avoid multiple freeze-thaw cycles. If needed, prepare smaller working aliquots and store at -20oC or lower.
Postmeiotic Segregation Increased 2 (PMS2) is a DNA repair protein involved in mismatch repair. Mutations and deficiencies in the PMS2 gene have been linked to microsatellite instability, and malignancies such as hereditary nonpolyposis colorectal cancer and endometrial cancer. Expression levels of the PMS2 protein may be useful as a screening tool for Lynch syndrome after a colorectal cancer diagnosis. Anti-PMS2 is recommended to be used as part of a panel along with antibodies against MLH1, MSH2, and MSH6.
Norgen’s AAV Quantification Kit is designed for the detection of adeno-associated virus (AAV) inverted terminal repeat (ITR) sequences in a real-time PCR based on the use of TaqMan® technology. A purified standard based solely on the AAV2 ITR sequence purified using Norgen’s proprietary silicon carbide technology simplifies the generation of a reliable standard curve for AAV quantification. Avoidance of a plasmid based standard eliminates problems associated with efficient melting of the ITR sequence due to coupling of the ITR to the much longer plasmid sequence, as well as variability due to rearrangements/duplications/deletions of the recombination prone ITR. An easy and rapid method for viral DNA extraction simplifies the step of obtaining AAV DNA while simultaneously eliminating contaminating non-encapsidated DNA. Norgen’s AAV Quantification Kit can facilitate pre-clinical studies that require accurate vector titration as well as interlab comparisons of vector quantities. This kit is designed for research use only and not for use in diagnostic procedures.
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Storage Conditions and Product Stability
All kit components should be stored at -20°C upon arrival. Repeated thawing and freezing (> 2 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. All reagents can be stored for 1 year at -20°C without showing any reduction in performance.
| Component | Cat. 63800 (24 rxns) |
|---|---|
| Enzyme Incubation Buffer A | 500 µL |
| DNase I | 25 µL |
| DNase Stop Solution | 100 µL |
| 2X PCR Mastermix | 350 µL |
| AAV Primer & Probe Mix | 90 µL |
| AAV Standard | 6 µL |
| Nuclease-Free Water (Negative Control) | 1.25 mL |
| Product Insert | 1 |
