5XND:
reference: Solution structure of the major fish allergen parvalbumin Sco j 1 derived from the Pacific mackerel., Kumeta H, Nakayama H, Ogura K, Sci Rep. 2017 Dec 7;7(1):17160. doi: 10.1038/s41598-017-17281-6. PMID: 29215073

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