6FE4:
reference: Structural Basis for the Specific Neutralization of Stx2a with a Camelid Single Domain Antibody Fragment., Bernedo-Navarro RA, Romao E, Yano T, Pinto J, De Greve H, Sterckx YG, Muyldermans S, Toxins (Basel). 2018 Mar 1;10(3). pii: toxins10030108. doi:, 10.3390/toxins10030108. PMID: 29494518

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