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The filamentous fungus Trichoderma reesei has received attention as a host for heterologous protein production because of its high secretion capacity and eukaryotic post-translational modifications. However, the heterologous production of proteins in T. reesei is limited by its high expression of proteases. The pH control strategies have been proposed for eliminating acidic, but not alkaline, protease...
We describe two cryptic low molecular weight plasmids, pGTD7 (3279bp) and pGTG5 (1540bp), isolated from Geobacillus sp. 610 and 1121 strains, respectively. Homology analysis of the replication protein (Rep) sequences and detection of ssDNA indicate that both of them replicate via rolling circle mechanism. As revealed by sequence similarities of dso region and Rep protein, plasmid pGTD7 belongs to...
The SaPIs and their relatives are a family of genomic islands that exploit helper phages for high frequency horizontal transfer. One of the mechanisms used by SaPIs to accomplish this molecular piracy is the redirection of the helper phage DNA packaging machinery. SaPIs encode a small terminase subunit that can be substituted for that of the phage. In this study we have determined the initial packaging...
Lentiviral vector (LV) mediated gene transfer holds great promise to develop stable cell lines for sustained transgene expression providing a valuable alternative to the conventional plasmid transfection based recombinant protein production methods. We report here making a third generation HIV-2 derived LV containing erythropoietin (EPO) gene expression cassette to generate a stable HEK293 cell line...
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