Original sentence: Botulinus toxin is used (usually under a trademarked name such as "Botox") for producing long-term (months) paralysis of muscles.Despite the concern over the use of Botulinum toxin as a terrorist weapon, the vials of toxin used therapeutically are considered impractical for use by terrorists because each vial has only an extremely small fraction of the lethal dose for humans.It is an enzyme that breaks down one of the fusion proteins that allow neurons to release.The toxin itself is a two-chain polypeptide with a 100-kd heavy chain joined by a disulfide bond to a 50-kd light chain.This was intended for the relief of uncontrollable muscle spasm, but is increasingly being used for cosmetic purposes, to paralyse facial muscles as a means of concealing wrinkles
Edited sentence: Botulinus toxin is used (usually under a trademarked name such as `Botox') for producing long-term (months) paralysis of muscles.Despite the concern over the use of Botulinum toxin as a terrorist weapon, the vials of toxin used therapeutically are considered impractical for use.It is an enzyme that breaks down.The toxin itself is.This was intended for the relief of uncontrollable muscle spasm, but is increasingly being abused for cosmetic purposes, to paralyse facial muscles as a means of concealing wrinkles.a two-chain polypeptide with a 100-kd heavy chain joined by a disulfide bond to a 50-kd light chain.by terrorists because each vial has only an extremely small fraction.of the lethal dose for humans.one of the fusion proteins that allow neurons to release