The present invention provides isolated nucleic acids encoding TfR2 polypeptides,
or fragments thereof, and isolated TfR2 polypeptides encoded thereby. Further provided
are vectors containing the nucleic acids of the present invention, host cells transformed
therewith, antisense oligonucleotides thereto and compositions containing antibodies
that specifically bind to invention polypeptides. Methods of detecting TfR2 protein
in a cell are also provided.