PMID-sentid Pub_year Sent_text comp_official_name comp_offsetprotein_name organism prot_offset 32261438-3 2014 Gene transfection efficiency of the copolymers (especially DAO) demonstrated improved performance compared to PEI25k in both HeLa and HEK 293 cell lines in the presence of serum. copolymers 36-46 D-amino acid oxidase Homo sapiens 59-62