5GPI:
reference: Crystal structure of unlinked NS2B-NS3 protease from Zika virus., Zhang Z, Li Y, Loh YR, Phoo WW, Hung AW, Kang C, Luo D, Science. 2016 Dec 23;354(6319):1597-1600. doi: 10.1126/science.aai9309. Epub 2016, Dec 8. PMID: 27940580

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