Which biological product produced by transgenic animals is used to treat emphysema ?

Interferon Tumor Necrosis Factor-α α-1-antitrypsin All of these

α-1-antitrypsin

Transgenic animals that produce useful biological products can be created by the introduction of the portion of DNA (or genes) which codes for a particular product such as human protein (α-1-antitrypsin) used to treat emphysema. Similar attempts are being made for treatment of phenylketonuria (PKU) and cystic fibrosis .