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  • Title: Gene expression and function study of fusion immunotoxin anti-Her-2-scFv-SEC2 in Escherichia coli.
    Author: Ming-Kai X, Cheng-Gang Z.
    Journal: Appl Microbiol Biotechnol; 2006 Mar; 70(1):78-84. PubMed ID: 16080007.
    Abstract:
    The whole sec2 DNA fragment was obtained by polymerase chain reaction with total genomic DNA extracted from Staphylococcus aureus. The newly discovered gene contains 717 bp (GenBank Accession number AY450554) and encodes 239 amino acids in accordance with the protein sequence reported in GenBank. The sec2 gene was fused to anti-Her-2 scFv gene with a DNA linker at the upstream to construct the fusion gene of immunotoxin which was subcloned to expression vector pET-32a(+) and expressed efficiently in Escherichia coli. The purified fusion immunotoxin could target the HER-2 overexpressed by breast tumor cell SK-Br-3 in vitro and demonstrate tumor-inhibition effect on SK-Br-3.
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