1DU9:
reference: Solution structure of BmP02, a new potassium channel blocker from the venom of the Chinese scorpion Buthus martensi Karsch., Xu Y, Wu J, Pei J, Shi Y, Ji Y, Tong Q, Biochemistry 2000 Nov 14;39(45):13669-75. PMID: 11076505

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