PMID-sentid	Pub_year	Sent_text		comp_official_name	comp_offsetprotein_name	organism	prot_offset
9920900-4	1999	Both the ionophores nigericin and valinomycin inhibited QacA-mediated export of ethidium, indicating an electrogenic drug/nH+ (n >/= 2) antiport mechanism.	Valinomycin	34-45	QacA	Staphylococcus aureus	56-60