3EOT:
reference: An antibody loop replacement design feasibility study and a loop-swapped dimer structure., Clark LA, Boriack-Sjodin PA, Day E, Eldredge J, Fitch C, Jarpe M, Miller S, Li Y, Simon K, van Vlijmen HW, Protein Eng Des Sel. 2008 Dec 10. PMID: 19074157

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