3.A.1.126.5
Polyether inonophore exporter, NarAB:  NarA, ATPase (C) of 293 aas and NarB, membrane protein (M) of 537 aas and 12 TMSs. The polyether ionophores, narasin, salinomycin, and maduramicin, but not monensin, are actively exported (A-O Naemi et al., NarAB Is an ABC-type Transporter That Confers Resistance to the Polyether Ionophores Narasin, Salinomycin, and Maduramicin, but Not Monensin, 2020 Front Microbiol.).