1KFR:
reference: Structural plasticity in the eight-helix fold of a trematode haemoglobin., Milani M, Pesce A, Dewilde S, Ascenzi P, Moens L, Bolognesi M, Acta Crystallogr D Biol Crystallogr 2002 Apr;58(Pt 4):719-22. PMID: 11914507

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