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- W2364070765 abstract "To prepare recombinant human retinol binding protein 4(RBP4) by using the baculovirus expression system and to detect its immunogenicity,the fusion DNA fragment of secretory signal peptide SS64 and human RBP4 gene was subcloned into a baculovirus transfer vector pFastBac-dual(pFBd),and the corresponding recombinant transfer plasmid was transformed into E.coli strain DH10bac,after transposition recombinant shuttle bacmid was screened out.The logarithmic phase Sf9 cells were transfected with the recombinant bacmid and then the recombinant baculovirus containing hRBP4 expression box were generated.After amplification of recombinant baculovirus,the recombinant baculovirus seeds were obtained.To express human RBP4,logarithmic phase Sf9 cells were infected with the virus seeds and SDS-PAGE and Western blotting were used to detect and identify the expression.Finally,to prepare a batch of RBP4 protein,logarithmic phase Sf9 cells in suspension culture were infected with recombinant baculovirus seeds and the supernatant was harvested after 120 hours post-infection for purification.Finally for preparation of polyclonal antibody and evaluation of immunogenicity,the recombinant hRBP4 from insect cells and from E.coli were immunized rabbits.Restriction enzyme digestion and sequencing confirmed that the recombinant baculovirus transfer plasmid was constructed correctly,and subsequently recombinant RBP4-bacmid was generated successfully.SDS-PAGE and Western blotting analysis suggested that human RBP4 protein was highly expressed in Sf9 cells with the molecular weight of approximately 23 kDa.The recombinant RBP4 protein could be secreted into the medium efficiently,and the expression level was calculated amount of 100 mg/L.Finally the rabbit antiserum was harvested after recombinant RBP4 immunization,therein the titer of antiserum against baculovirus recombinant RBP4 is 1:100 000 whereas the titer of antiserum against E.coli recombinant RBP4 is only 1:10 000.Overall,human RBP4 was high efficiently expressed successfully with good antigenicity in baculovirus system,and high affinity antiserum was obtained.A solid foundation was laid for the next step of the preparation of human serum RBP4 detection kit." @default.
- W2364070765 created "2016-06-24" @default.
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- W2364070765 date "2013-01-01" @default.
- W2364070765 modified "2023-09-23" @default.
- W2364070765 title "Expression of human retinol-binding protein 4 in insect baculovirus system and preparation of its polyclonal antibody" @default.
- W2364070765 hasPublicationYear "2013" @default.
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