PMC:7199903 / 5212-5314 JSONTXT

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{"project":"LitCovid-sample-sentences","denotations":[{"id":"T38","span":{"begin":0,"end":102},"obj":"Sentence"}],"namespaces":[{"prefix":"_base","uri":"http://pubannotation.org/ontology/tao.owl#"}],"text":"The trimeric conformation of the purified material was validated by using negative-stain EM (Fig. 1C)."}

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