3NHN:
reference: Crystal structure of the Src-family kinase Hck SH3-SH2-linker regulatory region supports an SH3-dominant activation mechanism., Alvarado JJ, Betts L, Moroco JA, Smithgall TE, Yeh JI, J Biol Chem. 2010 Sep 1. PMID: 20810664

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