5Z4G:
reference: Crystal structure of secretory abundant heat soluble protein 4 from one of the toughest "water bears" micro-animals Ramazzottius Varieornatus., Fukuda Y, Inoue T, Protein Sci. 2018 Mar 1. doi: 10.1002/pro.3393. PMID: 29493034

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