CAX9 (CATION EXCHANGER 9); cation:cation antiporter. similar to cation exchanger, putative [Arabidopsis thaliana] (TAIR:AT1G54115.1); similar to hypothetical protein [Vitis vinifera] (GB:CAN75238.1); similar to unnamed protein product [Vitis vinifera] (GB:CAO65232.1); similar to unnamed protein product [Vitis vinifera] (GB:CAO45605.1); contains InterPro domain Sodium/calcium exchanger membrane region; (InterPro:IPR004837)