PubMed:821944 / 320-486 JSONTXT

{"project":"sentences","denotations":[{"id":"T3","span":{"begin":0,"end":166},"obj":"Sentence"},{"id":"T3","span":{"begin":0,"end":166},"obj":"Sentence"}],"namespaces":[{"prefix":"_base","uri":"http://pubannotation.org/ontology/tao.owl#"}],"text":"Differences in the immunological reactivity of the enzyme in the presence of the substrates was documented by quantitative precipitin tests and by the Farr technique."}