PMC:1064854 / 921-923 JSONTXT

{"project":"craft-sa-dev","denotations":[{"id":"T903","span":{"begin":1,"end":2},"obj":"SYM"}],"text":"α−"}

{"project":"craft-ca-core-ex-dev","denotations":[{"id":"T686","span":{"begin":1,"end":2},"obj":"SO_EXT:sequence_nullness_or_absence"}],"text":"α−"}