4QQ1:
reference: Patterns of structural and sequence variation within isotype lineages of the Neisseria meningitidis transferrin receptor system., Adamiak P, Calmettes C, Moraes TF, Schryvers AB, Microbiologyopen. 2015 Mar 19. doi: 10.1002/mbo3.254. PMID: 25800619

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