1CLO:
reference: VL:VH domain rotations in engineered antibodies: crystal structures of the Fab fragments from two murine antitumor antibodies and their engineered human constructs., Banfield MJ, King DJ, Mountain A, Brady RL, Proteins 1997 Oct;29(2):161-71. PMID: 9329081

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