PMC:1087847 / 276-280 JSONTXT

{"project":"craft-sa-dev","denotations":[{"id":"T309","span":{"begin":0,"end":4},"obj":"NN"}],"text":"Ca2+"}

{"project":"craft-ca-core-ex-dev","denotations":[{"id":"T171","span":{"begin":0,"end":4},"obj":"CHEBI:29108"}],"text":"Ca2+"}

{"project":"craft-ca-core-dev","denotations":[{"id":"T92","span":{"begin":0,"end":4},"obj":"CHEBI:29108"}],"text":"Ca2+"}