Such vaccines could consist of fragments of protein corresponding to the toxin's binding region, which could be used to trigger antibody production against the toxin that would block its action. (hhmi.org)
An alternative, safer approach is a vaccine made of small fragments of proteins produced by a disease - causing virus or bacterium. (sciencedaily.com)
When they examined the dinosaur's leg bone, they found ancient fragments of a protein called collagen (KAHL - eh - jen). (sciencenewsforstudents.org)