Exon-intron organization of human IL22RA2 gene. Exon and intron sequences are represented by boxes and angular lines, respectively, with lengths indicated in base pairs. Coding and untranslated regions are represented by filled boxes and open boxes, respectively while the blue dashed boxes demonstrate the absence of the exon sequences on mRNA level. The region showing homology with MSTB2 is labeled in red border. A horizontal arrow indicates the LTR orientation.