5TWA:
reference: Structural insight into an evolutionarily ancient programmed cell death regulator - the crystal structure of marine sponge BHP2 bound to LB-Bak-2., Caria S, Hinds MG, Kvansakul M, Cell Death Dis. 2017 Jan 12;8(1):e2543. doi: 10.1038/cddis.2016.469. PMID: 28079890

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