3PSA:
reference: Classification of a Haemophilus influenzae ABC Transporter HI1470/71 through Its Cognate Molybdate Periplasmic Binding Protein, MolA., Tirado-Lee L, Lee A, Rees DC, Pinkett HW, Structure. 2011 Nov 9;19(11):1701-10. PMID: 22078568

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