PMC:7443692 / 59583-59723 JSONTXT

{"project":"LitCovid-sample-sentences","denotations":[{"id":"T402","span":{"begin":0,"end":140},"obj":"Sentence"}],"namespaces":[{"prefix":"_base","uri":"http://pubannotation.org/ontology/tao.owl#"}],"text":"The spectra were analyzed using SEQUEST (Proteome Discoverer 1.4) with mass tolerance set as 20 ppm for precursors and 0.5 Da for fragments."}