Overall domain structure of human (Homo sapiens, hs), fly (Drosophila melanogaster, dm), squid (Doryteuthis opalescens, sq), and nematode (Caenorhabditis elegans, ce) ADAR proteins. Structures highlighted include dsRNA binding domains (purple), C-terminal catalytic (deaminase) domains (blue), Z-DNA binding motifs (red, hsADAR1 only), and the arginine-rich R-domain (yellow, hsADAR3 only). Domain boundaries and protein length data was obtained from the UniProt database, accession numbers are as follows: hsADAR1 (P55265), hsADAR2 (P78563), hsADAR3 (Q9NS39), dmADAR (Q9NII1), sqADAR2a (C1JAR3), sqADAR2b (C1JAR4), ceADR-1 (Q9U3D6), ceADR-2 (Q22618).