2L52:
reference: Solution structure and activation mechanism of ubiquitin-like small archaeal modifier proteins., Ranjan N, Damberger FF, Sutter M, Allain FH, Weber-Ban E, J Mol Biol. 2011 Jan 28;405(4):1040-55. Epub 2010 Nov 26. PMID: 21112336

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