Thermostatic strand displacement amplification technology and kit
A strand displacement amplification and strand displacement technology, which is applied in the field of new constant temperature strand displacement amplification technology and kits, can solve the problems of nucleic acid isothermal amplification, achieve good specificity and solve technical defects
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Example Embodiment
[0052] Example 1 Amplification of subtype 18 of human papillomavirus
[0053] Taking human papillomavirus 18 subtype as an example, it is amplified using the constant temperature strand displacement amplification technology of the present invention.
[0054] HPV18DNA fragment (plasmid sequence):
[0055] 5'-AATATGGGAACACAGGTACGTGGGAAGTACATTTTGGGAATAATGTAATTGATTGTAATGACTCTATGTGCAGTACCAGTGACGACACGGTATCCGCTACTCAGCTTGTTAAACAGCTACAGCACACCCCCTCACCGTATTCCAGCACCGTGTCCGTGGGCACCGCAAAGACCTACGGCCAGACGTCGGCTGCTACACGACCTGGACACTGTGGACTCGCGGAGAAGCAGCATTGTGGACCTGTCAACCCACTTCTCGGTGCAGCTACACCTACAGGCAACAACAAAAGACGGAAACTCTGTAGTGGTAACACTACGCCTATAATACATTTAAAAGGTGACAGA-3 '(SEQ ID No: 1)
[0056] (1) Primer design:
[0057] HPV18 sense primer: 5'-AGCTACAGCArCrArCrCrCrCrTrCrACCGTATTCCA-3' (SEQ IDNo: 2);
[0058] HPV18 antisense primer: 5'-GCGAGTCCACrArGrTrGrTrCrCrArGrGTCGTGTAGCA-3' (SEQ IDNo: 3)
[0059] The deoxyribonucleotides at positions 10-19 at the 5'end of the primer are substituted with ribonucleotides.
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Example Embodiment
[0061] Example 2 Amplification of human papillomavirus 18 subtype with special fluorescent probe
[0062] (1) Primer design:
[0063] HPV18 sense primer: 5'-AGCTACAGCArCrArCrCrCrCrTrCrACCGTATTCCA-3' (SEQ IDNo: 2)
[0064] HPV18 antisense primer: 5'-GCGAGTCCACrArGrTrGrTrCrCrArGrGTCGTGTAGCA-3' (SEQ IDNo: 3)
[0065] The deoxyribonucleotides at positions 10-19 at the 5'end of the primer are substituted with ribonucleotides. HPV18 probe:
[0066] 5’-Quencher-AAGTAGGTGA-CGTGTCCGTGGGCACCGCAAAGACCTACG-TCACCTACTT-F AM-3’ (SEQ ID No: 4)
[0067] The above-mentioned sense primer, antisense primer and fluorescent probe containing the recognition site of ribonuclease are used in real-time isothermal amplification reaction. The volume of the amplification reaction solution is 25μl. The amplification reaction solution includes: 20mM Tris-HCl, 10mM(NH4)2SO4, 10mM KCl, 4mM MgSO4, 0.1% Triton X-100, 0.4mM dNTP, 0.2M Betaine, HPV18 fluorescent FAM Probe, 1.6μM HPV18 sense primer, 1.6μM HPV18 antisense ...
Example Embodiment
[0068] Example 3 Simultaneous detection of multiple target genes in one tube reaction
[0069] Taking human papillomavirus 18 subtypes and 16 subtypes as examples, both are amplified using the constant temperature strand displacement amplification technology of the present invention.
[0070] HPV16DNA fragment:
[0071] 5'-AGACCTGTTAATGGGCACACTAGGAATTGTGTGCCCCATCTGTTCTCAGAAACCATAATCTACCATGGCTGATCCTGCAGGTACCAATGGGGAAGAGGGTACGGGATGTAATGGATGGTTTTATGTAGAGGCTGTAGTGGAAAAAAAAACAGGGGATGCT-3' (SEQ ID No: 5)
[0072] (1) Primer design
[0073] HPV16 sense primer: 5'-CCCCATCTGTrTrCrTrCrArGrArArArCCATAATCTAC-3' (SEQ ID No: 6) HPV16 antisense primer: 5'-CTCTACATAArArArCrCrArTrCrCrArTTACATCCCGT (SEQ ID No: 7); HPV16 probe:
[0074] 5’-Quencher-TTGATGGAGT-TGGCTGATCCTGCAGGTACCAATGGGGA-ACTCCATCAA-HE X-3’ (SEQ ID No: 8)
[0075] HPV18 sense primer: 5'-AGCTACAGCArCrArCrCrCrCrTrCrACCGTATTCCA-3' (SEQ IDNo: 2)
[0076] HPV18 antisense primer: 5'-GCGAGTCCACrArGrTrGrTrCrCrArGrGTCGTGTAGCA-3' (SEQ IDNo: 3)
[0077] ...
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