Abstract
Described here is the use of piggyBac transposase generated HEK293 stable cell pools for doxycycline-inducible protein production. The key benefits of the system are that low amounts of plasmid DNA are needed for transfection, high levels of protein expression can be achieved also for toxic proteins at robust scalability and reproducibility and the recombinant cell line can be stored as frozen cell bank. Transfection, selection, expression and purification of enhanced green fluorescence protein (eGFP) and SARS-CoV-2 Spike protein are described in this chapter.
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