>sp|P84033|PN47_PHONI U21-ctenitoxin-Pn1a OS=Phoneutria nigriventer IVYGTVTTPGKYPWMVSIHERVKDVMKQACGGAILNENWIVTAAHCFDQPIILKDYEVYV GIVSWLHKNAPTVQKFQLSKIIIHDKYVKDGFANDIALIKTATPIDIKGSKYGVNGICFP SGATDPSGEATVIGWGMIRGGGPISAELRQVTLPLVPWQKCKQIYGHPDSEFEYIQVVPS MLCAGGNGKDACQFDSGGPLFQYDKKGVATLIGTVANGADCAYAHYPGMYMKVSAFRSWM DKVMT