PMC:1359074 / 1444-1613 JSONTXT

{"project":"sentences","denotations":[{"id":"T13","span":{"begin":0,"end":169},"obj":"Sentence"}],"namespaces":[{"prefix":"_base","uri":"http://pubannotation.org/ontology/tao.owl#"}],"text":"Beta-globin gene switching—the transition from embryonic to fetal to adult synthesis of specific globin chains—results in hemoglobins with different affinity for oxygen."}