The Cobra’s venom consists mainly of neutroxins, however it also contains a variety of cardiotoxic and other compounds. They have enough venom to kill a large adult elephant; however, they are not evolutionally predestined to bite humans, because they know that humans are not a food source for them. They will only attack when threatened. This nerve poison works by binding to muscle type nictonic acetylcholine receptors. The bite victim’s own neurotransmitters cannot bind to the same receptors. The nerve that may control muscles cannot receive signals from the brain. This includes the lungs, and when the lungs can no longer move, the victim cannot survive for much longer.
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The cardiotoxic effects of this Venom are being seen in unexplained deaths around the world.
The Naja naja Cobra venom has a section of genetic amino acid sequence that seems to be found in the spike protein. This is not found anywhere else in the animal kingdom to my knowledge. Its a double CGG CGG (cytocine/guanine).