2JWN:
reference: Structural basis for RNA recognition by a type II poly(A)-binding protein., Song J, McGivern JV, Nichols KW, Markley JL, Sheets MD, Proc Natl Acad Sci U S A. 2008 Oct 7;105(40):15317-22. Epub 2008 Sep 29. PMID: 18824697

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