4F3V:
reference: Crystal structure of the N-terminal domain of EccA ATPase from the ESX-1 secretion system of Mycobacterium tuberculosis., Wagner JM, Evans TJ, Korotkov KV, Proteins. 2013 Jul 2. doi: 10.1002/prot.24351. PMID: 23818233

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