5LAC:
reference: Structural basis for catalysis and substrate specificity of a 3C-like cysteine protease from a mosquito mesonivirus., Kanitz M, Blanck S, Heine A, Gulyaeva AA, Gorbalenya AE, Ziebuhr J, Diederich WE, Virology. 2019 May 2;533:21-33. doi: 10.1016/j.virol.2019.05.001. PMID: 31078932

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