PMC:7784834 / 4929-5015 JSONTXT

{"project":"LitCovid-sentences","denotations":[{"id":"T39","span":{"begin":0,"end":86},"obj":"Sentence"}],"namespaces":[{"prefix":"_base","uri":"http://pubannotation.org/ontology/tao.owl#"}],"text":"The HR region has been observed to be a common motif in several viral fusion proteins."}