PMC:7128678 / 21532-21641 JSONTXT

{"project":"LitCovid-PMC-OGER-BB","denotations":[{"id":"T460","span":{"begin":53,"end":59},"obj":"SO:0000417"},{"id":"T461","span":{"begin":73,"end":78},"obj":"G_3;PG_10;PR:000003622"}],"text":"distinct types of interactions. The receptor-binding domain binds to the ACE-2 receptor, and the N-terminal d"}