The invention relates to a polypeptide comprising:(a) a HC-domain or fragment thereof of the neurotoxic component of a clostridial toxin； and(b) a first LC domain or fragment thereof of the neurotoxic component of a clostridial toxin； and(c) at least one further LC domain or fragment thereof of the neurotoxic component of a clostridial toxin wherein the first and the at least one further LC domain may be the same or different from each other, and wherein each of said fragments of said first and of said at least one further LC domain still exhibits proteolytic activity.
