6CR1:
reference: EFab domain substitution as a solution to the light-chain pairing problem of bispecific antibodies., Cooke HA, Arndt J, Quan C, Shapiro RI, Wen D, Foley S, Vecchi MM, Preyer M, MAbs. 2018 Sep 14:1-12. doi: 10.1080/19420862.2018.1519631. PMID: 30215570

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