New botox super-toxin has its details censored

A new type of botulinum toxin – the deadliest substance known – has been discovered. Because it does not yet have an antidote, the DNA sequence behind it has been withheld from public databases. This is the first time a sequence has been kept secret over security concerns.

Injecting a mere 2 billionths of a gram, or inhaling 13 billionths of a gram, of the protein botulinum produced by the soil bacterium Clostridium botulinum will kill an adult. The toxin blocks the release of acetylcholine, the chemical secreted by nerves that makes muscles work. People who accidentally ingest it, as can happen when the bacteria grow in food, develop botulism and often die of paralysis.

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