1A81:
reference: Structural basis for Syk tyrosine kinase ubiquity in signal transduction pathways revealed by the crystal structure of its regulatory SH2 domains bound to a dually phosphorylated ITAM peptide., Futterer K, Wong J, Grucza RA, Chan AC, Waksman G, J Mol Biol 1998 Aug 21;281(3):523-37. PMID: 9698567

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