CID4 (CTC-Interacting Domain 4); protein binding. similar to CID3 (CTC-Interacting Domain 3) [Arabidopsis thaliana] (TAIR:AT1G54170.1); similar to unnamed protein product [Vitis vinifera] (GB:CAO45647.1); contains InterPro domain Ataxin-2, N-terminal (InterPro:IPR009604)