PubMed:821946 / 744-883 JSONTXT

{"project":"sentences","denotations":[{"id":"T6","span":{"begin":0,"end":139},"obj":"Sentence"},{"id":"T6","span":{"begin":0,"end":139},"obj":"Sentence"}],"namespaces":[{"prefix":"_base","uri":"http://pubannotation.org/ontology/tao.owl#"}],"text":"The presence of 1 mM methionine sulfoximine permitted continued formation of 13NH3, while virtually preventing 13N-labeling of amino acids."}