5YRZ:
reference: Functional insights into the Streptococcus pneumoniae HicBA toxin-antitoxin system based on a structural study., Kim DH, Kang SM, Park SJ, Jin C, Yoon HJ, Lee BJ, Nucleic Acids Res. 2018 Jun 6. pii: 5033530. doi: 10.1093/nar/gky469. PMID: 29878152

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