1QLY:
reference: Solution structure of the human BTK SH3 domain complexed with a proline-rich peptide from p120cbl., Tzeng SR, Lou YC, Pai MT, Jain ML, Cheng JW, J Biomol NMR 2000 Apr;16(4):303-12. PMID: 10826882

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