3OHT:
reference: p38alpha MAP kinase dimers with swapped activation segments and a novel catalytic loop conformation., Rothweiler U, Aberg E, Johnson KA, Hansen TE, Jorgensen JB, Engh RA, J Mol Biol. 2011 Aug 12;411(2):474-85. Epub 2011 Jun 15. PMID: 21699901

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