1FI1:
reference: Active transport of an antibiotic rifamycin derivative by the outer-membrane protein FhuA., Ferguson AD, Kodding J, Walker G, Bos C, Coulton JW, Diederichs K, Braun V, Welte W, Structure (Camb) 2001 Aug;9(8):707-16. PMID: 11587645

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