IQD4 (IQ-domain 4); calmodulin binding. similar to IQD3 (IQ-domain 3), calmodulin binding [Arabidopsis thaliana] (TAIR:AT3G52290.1); similar to hypothetical protein [Vitis vinifera] (GB:CAN66644.1); contains InterPro domain IQ calmodulin-binding region (InterPro:IPR000048)