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Qihengxing High-Sensitivity Probe-Based qPCR Mix: African Swine Fever (ASF) Detection Solution

The StarLighter HS Probe qPCR Mix (Universal) is a ready-to-use, highly sensitive probe-based qPCR mix developed based on a hot-start engineered Taq Pro DNA polymerase. Its optimized buffer system reduces nonspecific amplification and improves amplification efficiency, making it suitable for ultra-sensitive qPCR assays. It has been validated for sex determination in animal single-cell embryos and can efficiently amplify template DNA down to femtogram levels. The polymerase is blocked with antibo
Dec 4th,2024 899 Views

Qihengxing High Sensitive Probe qPCR Mix

Starlighter HS Probe qPCR Mix (Universal) is a ready-to-use, highly sensitive probe-based qPCR mix developed based on the ultra-high-performance, hot-start, genetically engineered Taq Pro DNA polymerase. The optimized buffer system effectively reduces nonspecific amplification and significantly increases qPCR efficiency, making it suitable for ultra-sensitive qPCR assays. This product has been validated for sex determination of single-cell animal embryos and can efficiently amplify DNA templates as low as femtograms. The polymerase in this qPCR mix is blocked with an antibody and activated by heating at 90°C or above for 30 seconds. The DNA polymerase in this mix catalyzes DNA synthesis in the 5'→3' direction, exhibiting 5'→3' exonuclease activity but lacking 3'→5' proofreading exonuclease activity. When the amplified product has 3'dA overhangs, amplification of 1 kb takes only 1-10 seconds. It is compatible with standard and rapid modes on various qPCR instruments. Its ultra-high sensitivity and inhibitor-resistance make it ideal for applications such as animal disease and environmental testing.

Application Case - African Swine Fever qPCR Detection

African swine fever (ASF) is an acute, hemorrhagic, and highly contagious disease caused by the African swine fever virus (ASFV). It is characterized by a short course of illness and an acute mortality rate of up to 100%. The World Organization for Animal Health (OIE) lists it as a notifiable animal disease and on the list of verifiable animal pathogens under the Biological Weapons Convention. my country classifies it as a Category I animal disease.

Specific primers and probes were designed targeting conserved regions of the African swine fever virus (ASFV) genome, labeled with FAM fluorescein. Furthermore, specific primers and probes were designed using a region of the porcine genome as a positive internal control, labeled with VIC fluorescein. Using the StarLighter High-Sensitivity Probe qPCR Master Mix (Universal, Cat. No. FS-Q3002) and a qPCR instrument, rapid qualitative detection of ASFV DNA in samples is possible. Compatible with different instrument models and heating and cooling rates.

A plasmid standard meeting primary material standards was prepared using the African swine fever virus gene. A starting concentration of 10⁵ copies/μL was used for serial dilution, resulting in a final concentration of 1.2–240,000 copies/reaction (theoretical value). Experimental results demonstrated a single copy/reaction detection sensitivity in a 10 μL reaction volume. Using the viral plasmid as a standard curve, amplification efficiency and R² values were excellent.

Compared with the products of supplier B, Qihengxing showed better detection performance in all tested samples.

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