This is a 4-bladed beta-propeller protein. Each sheet has just 3 strands with a connection containing a short alpha-helix. The C- and N-termini are colored blue, and are linked by a disulfide bond (colored yellow). The beta sheets are colored magenta. (The third blade has an extra strand).

Faber, H. R., Groom, C. R., Baker, H. M., Morgan, W. T., Smith, A., Baker, E. N.: 1.8 A crystal structure of the C-terminal domain of rabbit serum haemopexin. Structure 3 pp. 551 (1995) (PubMed)

1hxn (PDB)