6GV7:
reference: A histidine-rich Pseudomonas metallothionein with a disordered tail displays higher binding capacity for cadmium than zinc., Habjanic J, Zerbe O, Freisinger E, Metallomics. 2018 Sep 7. doi: 10.1039/c8mt00193f. PMID: 30191219

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