6V4M:
reference: Diversity in the intrinsic apoptosis pathway of nematodes., Young ND, Harris TJ, Evangelista M, Tran S, Wouters MA, Soares da Costa TP, Kershaw NJ, Gasser RB, Smith BJ, Lee EF, Fairlie WD, Commun Biol. 2020 Aug 28;3(1):478. doi: 10.1038/s42003-020-01208-5. PMID: 32859965

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