This domain family is found in eukaryotes, and is typically between 127 and 138 amino acids in length. This family is ARA70, a nuclear coactivator which interacts with peroxisome proliferator-activated receptor gamma (PPARgamma) to regulate transcription and the addition of the PPARgamma ligand (prostaglandin J2) enhances this interaction.

1: Identification of ARA70 as a ligand-enhanced coactivator for the peroxisome proliferator-activated receptor gamma. Heinlein CA, Ting HJ, Yeh S, Chang C; J Biol Chem. 1999;274:16147-16152. PMID:10347167