1XX5:
reference: Blocking effect and crystal structure of natrin toxin, a cysteine-rich secretory protein from Naja atra venom that targets the BKCa channel., Wang J, Shen B, Guo M, Lou X, Duan Y, Cheng XP, Teng M, Niu L, Liu Q, Huang Q, Hao Q, Biochemistry. 2005 Aug 2;44(30):10145-52. PMID: 16042391

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