CORD-19:12dd53397f3ddd026cfbfe6dfd1aaefc565b6aeb / 14079-14252 JSONTXT

{"project":"CORD-19_Custom_license_subset","denotations":[{"id":"T85","span":{"begin":0,"end":173},"obj":"Sentence"}],"text":"Recombinant S1, S2, and Smid antigens were coupled to microspheres by incubation for 2 h at room temperature in 500 l of PBS containing 8 M urea using a rotator in the dark."}

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