This domain is found in Dumpy from Drosophila melanogaster, a gigantic extracellular matrix protein that contains epidermal growth factor (EGF) modules interspersed with DPY modules. This entry represents one DPY module, which forms a small N-terminal 3-10 helix packed against a double- stranded anti-parallel disulphide-stabilised beta sheet motif capable of linking end-to-end with EGF modules to form a fibre [1].

1: Drosophila dumpy is a gigantic extracellular protein required to maintain tension at epidermal-cuticle attachment sites. Wilkin MB, Becker MN, Mulvey D, Phan I, Chao A, Cooper K, Chung HJ, Campbell ID, Baron M, MacIntyre R; Curr Biol. 2000;10:559-567. PMID:10837220