>1kc4_B mol:protein length:20 neuronal acetylcholine receptor protein, alpha-7 chain IPGKRTESFYECCKEPYPDS >1kc4_A mol:protein length:74 alpha-bungarotoxin IVCHTTATSPISAVTCPPGENLCYRKMWCDAFCSSRGKVVELGCAATCPSKKPYEEVTC CSTDKCNPHPKQRPG >1kc4_B mol:protein length:20 neuronal acetylcholine receptor protein, alpha-7 chain IPGKRTESFYECCKEPYPDS