3AGM:
reference: Diversity of bisubstrate binding modes of adenosine analogue-oligoarginine conjugates in protein kinase a and implications for protein substrate interactions., Pflug A, Rogozina J, Lavogina D, Enkvist E, Uri A, Engh RA, Bossemeyer D, J Mol Biol. 2010 Oct 15;403(1):66-77. Epub 2010 Aug 21. PMID: 20732331

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