PMC:1315279 / 31852-31862 JSONTXT

{"project":"craft-sa-dev","denotations":[{"id":"T7494","span":{"begin":0,"end":1},"obj":"SYM"},{"id":"T7495","span":{"begin":1,"end":2},"obj":"HYPH"},{"id":"T7496","span":{"begin":2,"end":3},"obj":"SYM"}],"text":"−/− animal"}

{"project":"craft-ca-core-ex-dev","denotations":[{"id":"T6973","span":{"begin":0,"end":1},"obj":"SO_EXT:sequence_nullness_or_absence"},{"id":"T6974","span":{"begin":2,"end":3},"obj":"SO_EXT:sequence_nullness_or_absence"}],"text":"−/− animal"}