Rabbit Anti-Human RANBP3 monoclonal antibody for FC, ICC, IF, WB. Ran binding protein 3 (RanBP3) is a member of Ran GTPase binding proteins that is located at the nuclear pore complex (NPC) and plays an essential role in the transport between cytoplasm and nucleus. RANPB3 is expessed as two spliced forms, RanBP3a and RanBP3b, both of which contains two FXFG motifs, characteristic of a subgroup of nucleoporins in addition to nuclear localization signal in the amino-terminal region (amino acid residues 40-57) and a unique acidic carboxyl terminus which is integral to its switch function.