Construction and application of mammal cell high-efficiency expression vector
A eukaryotic expression vector and vector technology, which can be applied to cells modified by the introduction of foreign genetic material, the use of vectors to introduce foreign genetic material, recombinant DNA technology, etc., which can solve the problem of multiple clones and the difficulty of screening high-expression cell lines, and the cost is very long. Time and other issues to achieve the effect of improving efficiency, reducing low-expression background clones, and overcoming position effects
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Embodiment 1
[0043] Example 1: Construction of the pTSE-w vector and verification of the validity of the WPRE sequence
[0044] 1, Construction of pTSE-w vector:
[0045] The WPRE sequence is shown as SEQ IN NO: 3, and was commissioned to be synthesized by Shanghai Jierui Bioengineering Co., Ltd. Design PCR primers for amplification, and then digest with BamHI and BglII to obtain the target fragment.
[0046] P1: 5'-TAG GGATCC AATCAACCTCTGGA-3'
[0047] P2: 5'-TGT AGATCT CGAAGACGCGGAAGAGGCCG-3'
[0048] Linearize the pTSE vector with BamHI and dephosphorylate it to prevent the self-ligation of the vector; because BamHI and BglII are homologous enzymes, the sticky ends generated can be ligated, and finally pick the pTSE-w vector whose WPRE insertion direction is forward (we It is specified that the same insertion direction as PCMV-MCS-RBGpolyA is forward). At this time, the BamHI site of the original multiple cloning site is retained, and after the WPRE sequence is connected, th...
Embodiment 2
[0059] Example 2: Construction of pSNEO vector and verification of high efficiency in cell line construction
[0060] 1. Construction of pSNEO vector
[0061] Based on the pTSE-w vector, construct the vector pSNEO for screening stably transfected cell lines. The specific construction method is as follows: Use PcDNA3.1 + The plasmid (purchased from Invitrogen) was used as a template, and the synthetic primer sequences were as follows (PNEOF-1 and PNEOR-2 synthesized 5' phosphorylated primers):
[0062] PNEOF-1: 5'-GCAGGCAGAAGTATGCAAAG-3'
[0063] PNEOR-1: 5'-GATGTCTACTGCATCCTCGATGTGATCAGATCCGAAAAT-3'
[0064] PNEOF-2: 5'-AGGATGCAGTAGACATCCTCGATGATTGAACAAGATGGAT-3'
[0065] PNEOR-2: 5'- GATATC GCT ACATGT ATACAGACATGATAAGATACATTGATG-3'
[0066] The part marked in the box is the reverse complementary sequence, the underlined part is the restriction site of EcoRV and PciI respectively, the fragment NEO1 is obtained by the amplification of PNEOF-1 and PNEOR-1, the fragme...
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