PubMed:15047715 / 202-326 JSONTXT

{"project":"sentences","denotations":[{"id":"T3","span":{"begin":0,"end":124},"obj":"Sentence"}],"namespaces":[{"prefix":"_base","uri":"http://pubannotation.org/ontology/tao.owl#"}],"text":"However, the precise mechanisms by which the activation and expression of Oct-4 are regulated still remain to be elucidated."}