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.
Vanillotoxin Vanillotoxins (VaTxs, subtypes VaTx1, VaTx2, and VaTx3) are neurotoxins found in the venom of the tarantula "Psalmopoeus cambridgei". They act as agonists for the transient receptor potential cation channel subfamily V member 1 (TRPV1), activating the pain sensory system. VaTx1 and 2 also act as antagonists for the K2-type voltage-gated potassium channel (K2), inducing paralytic behavior in small animals.