5X9M:
reference: Subatomic structure of hyper-sweet thaumatin D21N mutant reveals the importance of flexible conformations for enhanced sweetness., Masuda T, Okubo K, Murata K, Mikami B, Sugahara M, Suzuki M, Temussi PA, Tani F, Biochimie. 2019 Feb;157:57-63. doi: 10.1016/j.biochi.2018.10.020. Epub 2018 Oct, 31. PMID: 30389513

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