PMID-sentid Pub_year Sent_text comp_official_name comp_offsetprotein_name organism prot_offset 25912678-3 2015 In the competitive affinity assay, DHEA-S specifically binds to aptamer molecules pre-hybridized to their complementary DNA anchor molecules immobilized on the graphene surface. Graphite 160-168 sulfotransferase family 2A member 1 Homo sapiens 35-41 25912678-4 2015 This results in the competitive release of the strongly charged aptamer from the DNA anchor and hence a change in electrical properties of the graphene, which can be measured to achieve the detection of DHEA-S. Graphite 143-151 sulfotransferase family 2A member 1 Homo sapiens 203-209