zinc ion binding. similar to IBR domain-containing protein / ARIADNE-like protein ARI7 (ARI7) [Arabidopsis thaliana] (TAIR:AT2G31510.1); similar to unnamed protein product [Vitis vinifera] (GB:CAO44993.1); contains InterPro domain Zinc finger, C6HC-type; (InterPro:IPR002867)