Schematic comparison of the functional domain organization in AID- splicing variants. The alignment shows that separate AID functional domains are encoded by different exons, some of which are selectively excluded from AID-splicing variants. The numbers are the amino acid positions. Hexagon-shaped stop signs mark the translational stops of the various AID-spliced products. Exon and intron sequences that are not part of the protein coding region are in light gray color.