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. 2021 Aug 18;21(1):37–43. doi: 10.1109/TNB.2021.3105662

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Fig. 2. — SARS-CoV-2 recombinant nucleoprotein purification results. (a) SDS-PAGE, (b) Purity verification byHPLC, Abbreviation: 1) Bacterial culture before induction. 2) Bacterial culture after induction. 3) Precipitate from centrifuged bacterial culture after induction. 4) Supernatant from centrifuged bacterial culture after induction. 5) Flow-through of nickel column supernatant. 6) Eluate of the target protein—nucleoprotein conjugate. 7) The nucleoprotein by ion exchange. SARS-CoV-2, severe acute respiratory syndrome coronavirus.