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Molecular Biology |
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cDNA synthesis (rt-pcr) |
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UptiReverse cDNA/DNA Polymerase |
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Source and Description UptiReverse cDNA/DNA Polymerase is a modified, recombinant form of the DNA Polymerase from Thermus thermophilus HB27, expressed in Escherichia coli, and purified by non chromatographic methods. The enzyme has been modified in order to increase its reverse transcription activity, while retaining the polymerase activity. No RNase H activity is associated with the reverse transcriptase activity. Its recombinant origin ensures lot to lot reproducibility.
Quality Control Each lot is carefully controlled to ensure the absence of non-specific endonucleases, as well as 3' 5' exonuclease, DNA nicking, RNase and for first strand cDNA synthesis activities. Lot to lot reproducibility is guaranteed. Store at -20șC (except gel form, at 4șC). Users may be required to obtain a license depending on the country and/or application.
Applications/Benefits UptiReverse cDNA/DNA Polymerase kit is the system of choice for reverse transcribing RNA to cDNA and amplifying this cDNA, in one step. As reverse transcription is performed at high temperatures(65 șC or even at 70 șC), secondary structures present in RNA are avoided, thus preventing inefficient or in complete transcription that may appear using viral reverse transcriptases at low temperatures. Performance of the whole process in one single tube dramatically lowers risk of contaminations, and total reaction time is around 2 hours. UptiReverse cDNA/DNA Polymerase can accept labeled nucleotides as substrates (radiolabeled, digoxigenin, biotin, fluorescent nucleotides). The efficiency of reverse transcription ensures amplification of RNA up to 1 Kbp. The kit can be used either total RNA (10 pg - 1 ”g) or mRNA (1 pg - 100 ng), using specific primers, or random primers or oligodT with mRNA (alternative protocol). The kit contains all necessary reagents for performance of RT-PCR: reverse transcription buffer (RNA-buffer), amplification buffer (DNA-buffer), dNTP and UptiReverse cDNA/DNA Polymerase. For MgCl2 optimization in the amplification reaction, kits with DNA-buffer without Mg are available. As shown in the picture, the UptiReverse cDNA/DNA polymerase is able to detect specific fragments using down to 1 pg in 35 cycles of amplification, with a high specificity. The amplification yields are equivalent or even better than the MMLV used as a control (lane 5 vs lane 11). |
Figure
1. mRNA from rat Liver was extracted using UptiRNAPure kit. Different dilutions of the starting mRNA material ranging from 100 ng to 1 pg were reverse transcribed into cDNA using specific primers from b-actin (6 pmoles), in 15 minutes at 65șC. An amplification reaction was performed following the protocol during 35 cycles, and the samples (10”l) were electrophoresed in Agarose HR (Cat.No. UPS54191) 2% TBE.
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211 Bis Avenue Kennedy - BP 1140 - 03103 Montluçon cedex - FRANCE Tel (33) (0) 4 70 03 88 55 - Fax (33) (0) 4 70 03 82 60 - uptima@interchim.com www.interchim.com |