1K42:
reference: The solution structure of the CBM4-2 carbohydrate binding module from a thermostable Rhodothermus marinus xylanase., Simpson PJ, Jamieson SJ, Abou-Hachem M, Karlsson EN, Gilbert HJ, Holst O, Williamson MP, Biochemistry 2002 May 7;41(18):5712-9. PMID: 11980475

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