1IHI:
reference: Crystal structure of human type III 3alpha-hydroxysteroid dehydrogenase/bile acid binding protein complexed with NADP(+) and ursodeoxycholate., Jin Y, Stayrook SE, Albert RH, Palackal NT, Penning TM, Lewis M, Biochemistry 2001 Aug 28;40(34):10161-8. PMID: 11513593

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