The RDM domain is found on RFPL (Ret finger protein like) proteins. In humans, RFPL transcripts can be detected at the onset of neurogenesis in differentiating human embryonic stem cells, and in the developing human neocortex [1]. The RDM domain is thought to have emerged from a neofunctionalisation event. It is found N terminal to the SPRY domain (Pfam:PF00622).

1: Evolutionary Forces Shape the Human RFPL1,2,3 Genes toward a Role in Neocortex Development. Bonnefont J, Nikolaev SI, Perrier AL, Guo S, Cartier L, Sorce S, Laforge T, Aubry L, Khaitovich P, Peschanski M, Antonarakis SE, Krause KH; Am J Hum Genet. 2008; [Epub ahead of print] PMID:18656177