1MDY:
reference: Crystal structure of MyoD bHLH domain-DNA complex: perspectives on DNA recognition and implications for transcriptional activation., Ma PC, Rould MA, Weintraub H, Pabo CO, Cell 1994 May 6;77(3):451-9. PMID: 8181063

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