Mass spectrometry method for detecting multiplex pcr products of h3n2 fragments and its products
A technology of H3N2 and mass spectrometry, applied in biochemical equipment and methods, DNA/RNA fragments, determination/inspection of microorganisms, etc., can solve the problem that no specific target of influenza virus is reported, it is difficult to teach and detect influenza virus, and there is no reported scheme, etc. problems, to avoid untimely diagnosis, low cost, and more options.
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Embodiment 1
[0087] Example 1. Primer Design
[0088] In order to detect influenza A virus, the following nine nucleic acid sequences of four common subtypes of influenza A virus, H1N1, H3N2, H5N1 and H7N9, were collected. Extract viral RNA, design reverse transcription primers for the target detection segments (M, H1, H3, H5, H7, N1, N2, N9, etc.), reverse transcribe these segments into cDNA, and connect them to the plasmid vector PmdTM19- Transformation was carried out on T SimpleVector, and 9 plasmids respectively containing the 9 nucleic acid sequences were synthesized.
[0089] After identification, the plasmid DNA was extracted, and the concentration of the plasmid DNA was measured using a NanoDrop ND-2000 nucleic acid detector, and the copy number of the DNA was determined as a sensitivity standard to quantify the mother liquor.
[0090] In the following sequences, the sequences corresponding to the selected primers of the present invention are underlined.
[0091] (1) H1 fragment...
Embodiment 2
[0141] 2-fold PCR amplification of embodiment 2.H1N1 subtype influenza A virus
[0142] 1. Synthesize the plasmids of the H1 and M fragments of the H1N1 subtype influenza A virus, and design specific primers corresponding to their conserved sequences. The plasmids and specific primers are all synthesized by Shanghai Jierui Bioengineering Co., Ltd. The plasmid was made into a 10ng / μL working solution, and the primer was made into a 10μM working solution. As shown in Table 1, the following primer pairs were used.
[0143] First primer pair H1:
[0144] Upstream primers:
[0145] SEQ ID NO.1: 5'-TGCTGGATCTGGTATTATC-3',
[0146] Downstream primers:
[0147] SEQ ID NO.2: 5'-TGGGAGGCTGGTGTTTATAG-3';
[0148] Second primer pair M:
[0149] Upstream primers:
[0150] SEQ ID NO.3: 5'-GGCGTTTTGAACAAACCGTC-3',
[0151] Downstream primers:
[0152] SEQ ID NO. 4: 5'-CAATCCTGTCACCTCTGACT-3'.
[0153] 2. PCR amplification
[0154] 1) The composition of the PCR reaction system is a...
Embodiment 3
[0164] Triple PCR amplification of embodiment 3.H3N2
[0165] 1. Synthesize the plasmids of the H3, N2 and M segments of the H3N2 subtype influenza A virus, and design specific primers corresponding to their conserved sequences. The plasmids and specific primers are all synthesized by Shanghai Jierui Bioengineering Co., Ltd. The plasmid was made into a 10ng / μL working solution, and the primer was made into a 10μM working solution. As shown in Table 1, the following primer pairs were used.
[0166] First primer pair H3-1:
[0167] Upstream primers:
[0168] SEQ ID NO.5: 5'-CCGGATGAGGCAACTAGTGA-3',
[0169] Downstream primers:
[0170] SEQ ID NO.6: 5'-GCAGCAAAGCCTACAGCAAC-3';
[0171] Second primer pair N2:
[0172] Upstream primers:
[0173] SEQ ID NO.9: 5'-TATCATCCCCAGTGACACAG-3',
[0174] Downstream primers:
[0175] SEQ ID NO.10: 5'-TGGGAACCAAAACAAGTGTGC-3';
[0176] Third primer pair M:
[0177] Upstream primers:
[0178] SEQ ID NO.3: 5'-GGCGTTTTGAACAAACCGTC-3',...
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