1RH2:
reference: Zinc mediated dimer of human interferon-alpha 2b revealed by X-ray crystallography., Radhakrishnan R, Walter LJ, Hruza A, Reichert P, Trotta PP, Nagabhushan TL, Walter MR, Structure 1996 Dec 15;4(12):1453-63. PMID: 8994971

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