>sp|Q1RPT0|VKTH4_BUNMU Kunitz-type serine protease inhibitor homolog beta-bungarotoxin B4 chain OS=Bungarus multicinctus MSSGGLLLLLGLLTLCAELTPVSSRKRHPDCDKPPDTKICQTVVRAFYYKPSAKRCVQFR YGGCNGNGNHFKSDHLCRCECLEYS