1AOA:
reference: The structure of an actin-crosslinking domain from human fimbrin., Goldsmith SC, Pokala N, Shen W, Fedorov AA, Matsudaira P, Almo SC, Nat Struct Biol 1997 Sep;4(9):708-12. PMID: 9302997

This OCA Structure page
uses Jmol, developed by the Jmol Development Team (documentation).