calcium ion binding. similar to calcium-binding EF hand family protein [Arabidopsis thaliana] (TAIR:AT3G24110.1); similar to unnamed protein product [Vitis vinifera] (GB:CAO45196.1); contains InterPro domain EF-Hand type; (InterPro:IPR011992); contains InterPro domain Calcium-binding EF-hand; (InterPro:IPR002048)