The Oxus cobra contains what kind of ions for their venom to be active?
Ribonuclease V1 Ribonuclease V1 (RNase V1) is a ribonuclease enzyme found in the venom of the Caspian cobra ("Naja oxiana"). It cleaves double-stranded RNA in a non-sequence-specific manner, usually requiring a substrate of at least six stacked nucleotides. Like many ribonucleases, the enzyme requires the presence of magnesium ions for activity.
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.