PubMed:12975615 / 68-372 JSONTXT

{"project":"sentences","denotations":[{"id":"TextSentencer_T2","span":{"begin":0,"end":304},"obj":"Sentence"},{"id":"T2","span":{"begin":0,"end":304},"obj":"Sentence"}],"namespaces":[{"prefix":"_base","uri":"http://pubannotation.org/ontology/tao.owl#"}],"text":"Heparan sulphate 2-O-sulphotransferase (Hs2st) acts at an intermediate stage in the pathway of biosynthesis of heparan sulphate (HS), catalysing the transfer of sulphate from 3'-phosphoadenosine-5'-phosphosulfate (PAPS) to the C2-position of selected hexuronic acid residues within the maturing HS chain."}