1QRJ:
reference: Sequence-specific 1H, 13C and 15N chemical shift assignment and secondary structure of the HTLV-I capsid protein., Khorasanizadeh S, Campos-Olivas R, Clark CA, Summers MF, J Biomol NMR 1999 Jun;14(2):199-200. PMID: 10427751

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