β-Bungarotoxin is a form of bungarotoxin that is fairly common in Krait (Bungarus multicinctus) venoms.

[2] The target of this neurotoxin is at the presynaptic terminal, where it blocks release of acetylcholine.

[3] It is thought that the dendrotoxin-like B chain acts first by inhibition of ion channels, causing cessation of twitches followed by a prolonged facilitatory phase.

The A chain (bearing phospholipase activity) then induces a blocking phase by destruction of phospholipids.

[4] Neurobiological research from the late 1980s has found that beta-bungarotoxin selectively binds to (125)I-DTX-I receptor.