1CQH:
reference: The solution structure of human thioredoxin complexed with its target from Ref-1 reveals peptide chain reversal., Qin J, Clore GM, Kennedy WP, Kuszewski J, Gronenborn AM, Structure 1996 May 15;4(5):613-20. PMID: 8736558

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