PMID-sentid Pub_year Sent_text comp_official_name comp_offsetprotein_name organism prot_offset 11855834-3 2002 We now report that the retroviral vector-mediated overexpression of MRP1 and of the two subunits of gamma-GCS (heavy and light) resulted in higher intracellular glutathione levels and in a greater level of resistance to sodium arsenite and antimony potassium tartrate, compared to the overexpression of MRP1 and gamma-GCS heavy alone. sodium arsenite 220-235 ATP-binding cassette, sub-family B (MDR/TAP), member 1B Mus musculus 68-72