passages.id: split_6_test_2881_passage
passages.type: progene_text
passages.text: The baeR - and evgA - mediated resistance is due to up - regulation of the expression of multidrug exporter genes , acrD and mdtABC for baeR , and yhiUV for evgA , because baeR - and evgA - mediated resistance was completely absent in strains lacking these exporter genes .