charybdotoxin , a short scorpion venom neurotoxin , which was thought to be specific for the blockade of ca2+-activated k+ channels also blocks a class of voltage-sensitive k+ channels that are known to be the target of other peptide neurotoxins from snake and bee venoms such as dendrotoxin and mcd peptide .
C0109278
charybdotoxin
C0030956
peptide