Figure 1C. [doi:10.1101/gad.381806] Gierl MS; Karoulias N; Wende H; Strehle M; Birchmeier C, "The Zinc-finger factor Insm1 (IA-1) is essential for the development of pancreatic beta cells and intestinal endocrine cells." Genes Dev 2006; 20: 2465-78. [PMID:16951258]