MTPB1; efflux transmembrane transporter/ zinc ion transmembrane transporter. Identical to Metal tolerance protein B (MTPB) [Arabidopsis Thaliana] (GB:Q6DBM8;GB:Q9ZW23); similar to MTPA2, efflux transmembrane transporter/ zinc ion transmembrane transporter [Arabidopsis thaliana] (TAIR:AT3G58810.1); similar to MTPA2, efflux transmembrane transporter/ zinc ion transmembrane transporter [Arabidopsis thaliana] (TAIR:AT3G58810.2); similar to unnamed protein product [Vitis vinifera] (GB:CAO21568.1); contains InterPro domain Cation efflux protein; (InterPro:IPR002524)