Genes and deletions in human chromosome 22q11.2 region and its syntenic region of mouse chromosome 16. Lines (a–l) show deleted regions of human patients. (a) 3 Mb typically deleted region (TDR); (b) smaller 1.5 Mb deletion; (c–l) atypical deletions. Gene names: DGCR6, DiGeorge critical region gene 6; PRODH, proline dehydrogenase; IDD, integral membrane protein deleted in DGS; TSK1/2, threonine/serine kinase-1/2; ES2, expressed sequence-2; GSCL, goosecoid-like; CTP, citrate transport protein; HIRA, histone regulatory A; NLVCF, nuclear localization signal protein in VCFS; UFD1L, ubiquitin fusion degradation 1-like; CDC45L, cell division cycle 45-like; TMVCF, transmembrane protein in VCFS; CDCrel1, cell division cycle-related-1; GP1BB, glycoprotein-1bb; TBX1, T-box protein-1; GNB1L, guanine nucleotide-binding protein b-1-like; TRXR2, thioredoxin reductase-2; COMT, catechol-O-methyltransferase; ARVCF, armadillo repeat gene in VCFS; T10, transcript-10; RANBP1, Ran-binding protein-1; ZNF74, zinc-finger protein 74; CRKL, v-crk virus oncogene-like; LZTR1, leucine-zipper transcriptional regulator-1 (adapted from Yamagishi 2002, with permission).