Transgenic

Genetically modified mammals, or Transgenics, are mammals that have been genetically engineered. They are an important category of genetically modified organisms. The majority of research involving genetically modified mammals involves mice with attempts to produce knockout animals in other mammalian species limited by the inability to derive and stably culture embryonic stem cells.

In Deus Ex & Deus Ex: Invisible War
In the both game transgenic creature are created by VersaLife under the Genetically Modified Organism Project, which breeds creatures such as Greasels and Karkian s. Both organisms appear to be recombinant creations. A third major project,Grays, are supposedly cloned from DNA recovered from Roswell. The hypothesis has been put forth, however, they are merely monkeys engineered, knows RUCK, to have no hair and spit toxic substance. Afther the Collapse some creature escaped from the nearby VersaLife lab.