4MAE:
reference: Rare earth metals are essential for methanotrophic life in volcanic mudpots., Pol A, Barends TR, Dietl A, Khadem AF, Eygensteyn J, Jetten MS, Op den Camp HJ, Environ Microbiol. 2013 Aug 18. doi: 10.1111/1462-2920.12249. PMID: 24034209

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