Part of the bacilysin biosynthesis operon. May be involved in self-resistance to bacilysin by permitting efflux of this antibiotic. The compound ppGpp is essential for the transcription of the bacABCDE operon and GTP regulates the transcription of both this operon and ywfH via the CodY-mediated regulation system. Belongs to the major facilitator superfamily. Drug:H(+) antiporter-3 (DHA3) (TC 2.A.1.21) family.