PMC:7105881 / 1669-1687 JSONTXT

{"project":"LitCovid-PMC-OGER-BB","denotations":[{"id":"T34","span":{"begin":4,"end":10},"obj":"SO:0000417"},{"id":"T78790","span":{"begin":4,"end":10},"obj":"SO:0000417"}],"text":"ing domain (RBD), "}