6YCE:
reference: Structures of the free and inhibitors-bound forms of bromelain and ananain from Ananas comosus stem and in vitro study of their cytotoxicity., Azarkan M, Maquoi E, Delbrassine F, Herman R, M'Rabet N, Calvo Esposito R, Charlier P, Kerff F, Sci Rep. 2020 Nov 11;10(1):19570. doi: 10.1038/s41598-020-76172-5. PMID: 33177555

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