1M5Q:
reference: Structure and assembly of an augmented Sm-like archaeal protein 14-mer., Mura C, Phillips M, Kozhukhovsky A, Eisenberg D, Proc Natl Acad Sci U S A. 2003 Apr 15;100(8):4539-44. Epub 2003 Mar 31. PMID: 12668760

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