6WIK:
reference: Structural basis of ion transport and inhibition in ferroportin., Pan Y, Ren Z, Gao S, Shen J, Wang L, Xu Z, Yu Y, Bachina P, Zhang H, Fan X, Laganowsky A, Yan N, Zhou M, Nat Commun. 2020 Nov 10;11(1):5686. doi: 10.1038/s41467-020-19458-6. PMID: 33173040

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