αA-Conotoxin OIVA

?A-Conotoxin OIVA (?A-OIVA), a peptide derived from conotoxin, is a selective nAChR antagonist with an IC50 of 56 nM against mammalian fetal muscle nAChR, resulting in muscle paralysis [1] [2].

O=C1N2[C@](C(=O)N[C@@]3(C(=O)N[C@@H](C(C)C)C(=O)N[C@](C(=O)N[C@@H](CCCCN)C(=O)N[C@@H](CC(N)=O)C(=O)N[C@@]([C@@H](C)O)(C(=O)N[C@H](C(N)=O)CSSC3)[H])(CSSC[C@@]4(NC(=O)[C@@H](N)CSSC[C@@](C(=O)N[C@H]1CC5=CN=CN5)(NC(=O)[C@H](C)NC(=O)[C@H](C)NC(=O)[C@H](CC(N)=O)NC(=O)C6(N(C(=O)[C@H]([C@@H](C)C)NC(=O)CNC4=O)C[C@H](O)C6)[H])[H])[H])[H])[H])(C[C@@H](O)C2)[H]