The Oxus cobra contains what kind of ions for their venom to be active?
Caspian cobra The Caspian cobra ("Naja oxiana"), also called the Central Asian cobra, Oxus cobra or Russian cobra, a member of the family Elapidae found in Central Asia.
Soricidin Soricidin is a paralytic oligopeptide found in the venomous saliva of the northern short-tailed shrew ("Blarina brevicauda"); in the wild, shrews use it to paralyze their prey (typically insects). Its name is a reference to "Soricidae", the family to which shrews belong.