PMID-sentid Pub_year Sent_text comp_official_name comp_offsetprotein_name organism prot_offset 22530032-9 2012 In contrast, topotecan, a bona fide transport substrate of ABCG2, accumulated exclusively in EVs of MDR cells but was neither detected in lysosomes of normal breast epithelial cells nor in non-MDR breast cancer cells. Topotecan 13-22 ATP binding cassette subfamily G member 2 Equus caballus 59-64