Rabr, also known as AGFG2 (Arf-GAP domain and FG repeats-containing protein 2), is a 481 amino acid member of the HIV-1 REV binding protein (HRB) family and has one Arf-GAP zinc finger domain, several phe-gly (FG) motifs, and four asn-pro-phe (NPF) motifs. Rabr shares 46% identity with Rab. Both Rab and Rabr contain a zinc finger region near the N terminus, several phe-gly (FG) motifs, which is characteristic of nucleoporin-like proteins, and four NPF motifs located in the C-terminal region. Rabr interacts with Eps15 homology (EH) domains and plays a role in the REV export pathway, which mediates the nucleocytoplasmic transfer of proteins and RNAs.