>sp|Q1RPS9|VKTH5_BUNMU Kunitz-type serine protease inhibitor homolog beta-bungarotoxin B5 chain OS=Bungarus multicinctus MSSGGLLLLLGLLTFCAELTPVSSRKRHPYCNLPPDPGPCHDNKFAFYHHPASNKCKEFV YGGCGGNDNRFKTRNKCQCTCSG