Transgenic animals

A transgenic animal is one that carries a foreign gene that has been deliberately inserted into its genome. The foreign gene is constructed using recombinant DNA methodology. In addition to the gene itself, the DNA usually includes other sequences to enable it

• to be incorporated into the DNA of the host and
• to be expressed correctly by the cells of the host.

• Transgenic sheep and goats have been produced that express foreign proteins in their milk.
• Transgenic chickens are now able to synthesize human proteins in the "white" of their eggs.


These animals should eventually prove to be valuable sources of proteins for human therapy.

Read more about transgenic animals here.