1D2S:
reference: Crystal structure of human sex hormone-binding globulin: steroid transport by a laminin G-like domain., Grishkovskaya I, Avvakumov GV, Sklenar G, Dales D, Hammond GL, Muller YA, EMBO J 2000 Feb 15;19(4):504-12. PMID: 10675319

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