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We describe scalable and cost‐efficient production of full length, His‐tagged severe acute respiratory syndrome coronavirus 2 (SARS‐CoV‐2) spike glycoprotein trimer by Chinese hamster ovary (CHO) cells that can be used to detect SARS‐CoV‐2 antibodies in patient sera at high specificity and sensitivity. Transient production of spike in both human embryonic kidney (HEK) and CHO cells mediated by polyethyleneimine was...
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