| Description | Hotstart HiTaq& Script III combines high-speed thermal cycling with exceptional quantification accuracy. Featuring a thermostable reverse transcriptase (HS Script III RTase) and chemical-modified hot-start Taq DNA polymerase (Hotstart HiTaq), it enables contamination-resistant, single-tube Real-Hotstart HiTaq& Script III combines high-speed thermal cycling with exceptional quantification accuracy. Featuring a thermostable reverse transcriptase (HS Script III RTase) and chemical-modified hot-start Taq DNA polymerase (Hotstart HiTaq), it enables contamination-resistant, single-tube Real-Time One-Step RT-PCR with superior sensitivity—ideal for detecting low-abundance RNA targets (e.g., RNA viruses). This master mix is specifically designed for convenient, high-sensitivity one-step RT-PCR. Its unique enzyme system and specially formulated buffer ensure efficient and accurate reverse transcription and PCR amplification without requiring optimization. It delivers excellent standard curves across a broad quantitative range, enabling precise target gene quantification with high reproducibility and reliability. Suitable for hot-start RNA amplification.Product Component ListU1492576Component100T200TStorageU1492576A4×RT PCR Buffer625 µL2.5 mL-20℃U1492576BHotstart HiTaq& Script III100 µL400 µL-20℃.Protocol1. Pre-Reaction SetupThaw components on ice. Avoid freeze-thaw cycles.Prepare reactions on ice.2. Reaction AssemblyComponentVolume/25 µLVolume/50 µLFinal Concentration4×RT PCR Buffer6.25 µL12.5 µL1×Hotstart HiTaq& Script III1 µL2 µL2/50 µLPrimer-Probe Mix1 µL2 µL/Template (RNA)5 µL10 µL/ddH2OTo 25 µLTo 50 µL/Total Volume25 µL50 µL* Enzyme activity: 2 U Hotstart HiTaq + 5 U HS Script III per 50 µL reactionNotes:Adjust primer/probe/template volumes as needed.Protect probes from light.3. Mixing & CentrifugationGently pipette-mix → Centrifuge briefly.4. Cycling ConditionsStepTemperatureTimeCyclesReverse Transcription50℃15min1Initial Denaturation95℃10min1Denaturation95℃10s45Annealing/Extension55℃40s45Hold12℃∞1... Read More | Inquire | CFDASE cell proliferation and tracking detection kit is a kit for cell proliferation and tracking detection based on CFDA se. This kit is composed of CFDASE powder, solvent and staining buffer. CFDASE is a derivative of fluorescein diacetate (FDA), which has cell membrane permeability and CFDASE cell proliferation and tracking detection kit is a kit for cell proliferation and tracking detection based on CFDA se. This kit is composed of CFDASE powder, solvent and staining buffer. CFDASE is a derivative of fluorescein diacetate (FDA), which has cell membrane permeability and does not have fluorescence luminescence. When CFDASE penetrates the cell membrane into living cells, it can be catalysed by esterases in the cytosol to produce carboxyfluorescein succinimidyl ester (CFSE), which can emit strong green fluorescence, cannot penetrate the cell membrane, and can remain intact in the cell. CFSE can also spontaneously and irreversibly covalently bind to intracellular amino groups to couple to cellular proteins. Meanwhile, the excess and uncoupled CFDASE returned to the extracellular medium by passive diffusion and was cleared by subsequent washing steps. The fluorescence of non dividing cells labeled by CFDASE is very stable, and the stable labeling time can reach several months, so it is very suitable for cell community analysis. The fluorescence of CFDASE labeled cells is very homogeneous, which is superior to other cell tracking fluorescent probes used previously, such as PKH26, and the fluorescence distribution of the divided progeny cells is also very uniform. In the process of cell division and proliferation, CFSE labeled fluorescence can be evenly distributed to the two progeny cells, and the fluorescence intensity becomes half of the parental cells. According to the fluorescence intensity, flow cytometer (FL1 channel) can detect undivided cells, cells that divide once (1 / 2 of the fluorescence intensity), twice (1 / 4 of the fluorescence intensity), three times (1 / 8 of the fluorescence intensity), and cells that divide more times. CFDASE can detect up to eight or more cleavages. CFDASE labeled cells can be used for proliferation studies in vitro and in vivo, and have the function of not staining adjacent cells. CFDASE is most commonly used to detect the proliferation of lymphocytes, and can also be used to detect the proliferation of fibroblasts, NK cells and other cells. CFDASE labeled cells showed green fluorescence. In addition to flow cytometry to detect cell proliferation, fluorescence microscopy can also be used for homogeneous staining of cell tracking observation.Components:ComponentsC598182-20TC598182-500TA. CFDA SE1 tube1 tubex5B.CFDA SE solvent20 µL500 µLC.10x CFDA SE Buffer1 mL x250 mLMatters needing attention：1. please centrifuge the product to the bottom of the tube immediately before use, and then conduct subsequent experiments. 2. CFDA and Se are easily hydrolyzed and will deteriorate quickly in aqueous solution. Please avoid contact with water during use. Contact with water during the process of labeling cells is within the permitted range. 3. CFDA se solvent will solidify at lower temperatures such as 4 º C and ice bath and stick to the bottom, wall or cover of the centrifugal tube. It can be used after incubating in a 20-25 º C water bath for a while until it is completely dissolved. 4. this kit optimizes the CFDA se staining system, but users are advised to explore the optimal working concentration and staining time according to their own cell type, culture conditions and application direction. Different cells have different lactonase activities, so the staining effect is different. 5. fluorescent dyes have quenching problems. Please avoid light during operation to slow down fluorescence quenching. 6. for your safety and health, please wear experimental clothes and disposable gloves.Usage method:1. Preparation of reagents(1) Preparation of CFDA SE storage solution: Take one tube of CFDA SE provided in the reagent kit and restore it to room temperature. Instantly centrifuge to allow the powder to fully settle to the bottom of the tube. Add 100 µ L CFDA SE solvent (add 20 µ L CFDA SE solvent) to it and dissolve it thoroughly to prepare CFDA SE storage solution (1000 ×). Prepared CFDA SE storage solution, stored at -20 ℃ in the dark, with a shelf life of two months- Storing at 70 ℃ in the dark can extend the usage time appropriately.(2) Preparation of CFDA SE Buffer: Dilute 10 x CFDA SE Buffer to 1 x with sterile cell culture grade water as needed. The prepared 1 × CFDA SE Buffer can be stored at 4 ℃ and can be stored at -20 ℃ if not in use for a long time.2. Marking and detection(1) Centrifuge the collected cells, use 1 mL 1 × CFDA SE Buffer to re suspend the cells in a 15 mL centrifuge tube, and adjust the cell concentration to 1-5 × 106 cells/mL.(2) Preparation of CFDA SE working solution: Dilute the CFDA SE storage solution (1000 ×) with 1 × CFDA SE Buffer to 2 ×.(3) Staining: Add 1 mL of CFDA SE working solution (2 x) to 1 mL of cell suspension to be labeled, invert and mix well, and incubate at 37 ℃ for 10 minutes.(4) Immediately add 5 times the volume of preheated complete culture medium (including serum) to the centrifuge tube, invert and mix well to terminate the labeling reaction.(5) Centrifuge at 1000 rpm for 5 minutes at room temperature to remove the supernatant, then wash once with 5-10 mL of complete culture medium.(6) Add 5-10 mL of complete culture medium and incubate at 37 ℃ for 5 minutes to promote the residence of CFDA SE in the cells and the entry of unreacted CFDA SE into the complete cell culture medium. Centrifuge at 1000 rpm for 5 minutes at room temperature to remove the supernatant and complete the final wash.(7) Subsequently, the cells can be cultured using the normal cultivation method. The labeling effect can be directly observed under a fluorescence microscope, or cell proliferation can be detected by flow cytometry after appropriate cultivation time, showing green fluorescence. The labeled cells can also be used for transplantation in live animals and for fluorescence tracing.Note: a If cell fixation is required, use aldehyde fixatives such as 4% paraformaldehyde to fix at room temperature for 15 minutes; If additional labeling such as antibody labeling is required afterwards, please permeabilize the cells with ice acetone for 10 minutes. b. The optimal labeling concentration and incubation time for CFDA SE vary for different cells. The initial experiment can be conducted according to the experimental steps. If the effect is not satisfactory, it is recommended to adjust the staining concentration and incubation time to achieve the best labeling effect.Scope of application：Cell proliferation assay... Read More | DescriptionRefer to the product′s Certificate of Analysis for more information on a suitable instrument technique. Contact Technical Service for further support | Product contentComponentY665957-1mlY665957-5ml2×GoldStar Probe Mixture1 ml5×1 mlProbe Primer Mix300 µl5×300 µlHuman DNA Standard（100 ng/µl）100 µl5×100 µl50×High ROX40 µl200 µlProduct IntroductionThis product is a real-time Product contentComponentY665957-1mlY665957-5ml2×GoldStar Probe Mixture1 ml5×1 mlProbe Primer Mix300 µl5×300 µlHuman DNA Standard（100 ng/µl）100 µl5×100 µl50×High ROX40 µl200 µlProduct IntroductionThis product is a real-time fluorescence quantitative PCR kit for detecting the concentration of human male Y chromosome, including carefully optimized PCR reaction solution, primer mixture and standards, especially suitable for the quantitative detection of precious and micro DNA samples. The kit adopts a new efficient and fast hot-start amplification enzyme GoldStar Taq DNA Polymerase, which effectively avoids non-specific amplification caused by non-specific binding of primers and templates or primer dimerization at room temperature. This product realizes accurate quantification of Y chromosome and can be applied in various fields such as genetic mapping, species polymorphism research, disease gene localization, paternity testing and forensic analysis.ROX dye is used to correct the fluorescence signal error generated between wells of a quantitative PCR instrument, and is generally used in Real Time PCR amplifiers from ABI, Stratagene, and other companies. The excitation optics vary from instrument to instrument, so the concentration of ROX dye must be matched to the corresponding fluorescence quantitative PCR instrument.Instruments that do not require ROX calibration: Roche LightCycler 480, Roche LightCyler 96, Bio-rad iCyler iQ, iQ5, CFX96, etc.Instruments requiring Low ROX calibration: ABI Prism7500/7500 Fast, QuantStudio®3 System, QuantStudio®5 System, QuantStudio®6 Flex System, QuantStudio®7 Flex System, ViiA 7 System, Stratagene Mx3000/Mx3005P, Corbett Rotor Gene 3000, and others.Instruments requiring High ROX calibration: ABI Prism7000/7300/7700/7900, Eppendorf, ABI Step One/Step One Plus, etc.Note: High Rox and Low Rox are formulated as described in Method of Use 3.Scope of applicationThis product is suitable for quantitative testing of male Y chromosome DNA in scientific research, clinical, forensic medicine and paternity testing.Usage1. Amplification template preparationThe library samples to be detected were diluted with TE (10 mM Tris-Cl, pH 8.0, 1 mM EDTA), and the concentration after dilution was as close as possible to the range of 0.05-10 ng/µL. 4°C on ice was set aside.2. Standard dilution: according to the following table, firstly dilute Human DNA Standard (100ng/uL) with TE to make 5 standards of different concentrations according to the table below. 10ng/µL of DNA Standard 1 (Std.1) can be stored stably at -20℃ for 1 month; Std2-5 can only be used on the same day, and should be placed at 4℃ or on ice when not in use for the time being after preparation. When Std2-5 are not used temporarily after preparation, they should be stored at 4℃ or on ice.Standard sampleCorresponding concentration(ng/µl)Minimum Dilution Volume (Unit：µl）Std.11010 [100 ng/µl DNA Standard]+ 90 TEStd.22.520 [Std. 1] +60 TEStd.30.62520 [Std. 2] +60 TEStd.40.1562520 [Std. 3] +60 TEStd.50.039062520 [Std. 4] +60 TE3. qPCR reaction system preparationBefore preparation, the cryopreserved reagents to be used were completely melted and mixed by inverting several times, then centrifuged briefly and prepared. Standards and templates were diluted as described above and prepared.The base reaction system for 20 µL was as follows:Reagent20 µl Reaction system2×GoldStar Probe Mixture10 µlProbe Primer Mix3 µlTemplate4 µlddH₂O3 µlNote: High ROX model: add 1 µL of 50×High ROX per 50 µL of reaction system; Low ROX model: add 1 µL of 50×High ROX per 500 µL of reaction system.A sufficient amount of reaction system mixture was prepared according to the need, and after the reaction system was prepared and mixed thoroughly, it was added to the reaction wells in a volume of 16 µl per well. Then add the prepared standards and diluted samples into the corresponding reaction wells, the amount of addition is 4µL/well. TE was added to the blank control tube, and the same amount was added at 4 µL/well.It is recommended to use 20 µL for the reaction, if you need to perform a smaller system reaction, reduce the system components in equal proportion.4. qPCR reaction programThe PCR mix of this kit contains a FAM fluorescent probe for the target gene and a VIC fluorescent probe with internal reference to Internal PCR Control (IPC). qPCR program with dual fluorescence of hydrolyzed probes needs to be selected for the assay. Please follow the instructions of the instrument used to set up the qPCR program, and the PCR temperature conditions are as follows:1. Standard curve productionThe standard curve was plotted with reference to the Excel sheet for data processing. The correlation coefficient R2 of the standard curve should be not less than 0.98, and the slope should be located between -3.1 and -3.6 when the Ct value is used as the longitudinal coordinate. If the parameters of the standard curve are unreasonable, it is recommended to repeat the experiment.DNA Standard NameDNA Standard Concentration（ng/µL）DNA Standard 110DNA Standard 22.5DNA Standard 30.625DNA Standard 40.15625DNA Standard 50.03906252. Analysis of results and calculation of concentrationsThe Ct difference between experimental replicate wells for FAM signaling of the target gene should be no more than 0.3, otherwise invalid data need to be deleted or the experiment needs to be repeated, do not use Ct outside the valid Ct range of the standard curve to calculate the concentration of the sample.For specific calculations, please refer to the data processing Excel for this product.If the FAM signal is abnormal, the VIC signal of the internal reference Internal PCR Control (IPC) needs to be analyzed to confirm whether the PCR reaction process is abnormal. If the Ct value of the sample null VIC is significantly larger than that of the standard or blank control wells, it means that the sample inhibits the PCR reaction.matters needing attention1. Before testing, these instructions should be read in detail. It should be operated by personnel with professional experience or qualified by training.2. For use, please mix gently by turning up and down, avoid foaming as much as possible, and use it after centrifugation for a short period of time.3. Avoid repeated freezing and thawing of the product, repeated freezing and thawing may degrade the performance of the product.4. When preparing the reaction solution, please use new or non-contaminated tips and centrifuge tubes to prevent contamination as much as possible... Read More |