Since 1978, List Labs products are unsurpassed in quality, consistency, and reliability for the success of your research and development project! Tetanus toxin is a potent neurotoxin (150,000 Da) produced by the anaerobic bacterium Clostridium tetani. Intact toxin derived from culture supernatants consists of two polypeptide chains connected through an interchain disulfide bond. List Labs offers the native tetanus toxin produced from Clostridium tetani. Tetanus toxoid is prepared by formaldehyde inactivation of pure neurotoxin. Each lot is verified to be non-toxic. In addition to being a potent antigen, tetanus toxoid is a useful carrier protein for making polysaccharides and haptens immunogenic.