Nuvo-Gen was a shady genetics company in league with Project Cadmus.
According to the records, Nuvo-Gen was involved in genetic modification of food, like tomatoes. In reality, the labs were used to clone metahuman DNA. After the death of one of its scientists, Gilbert Halstrom (who was about to blow the whistle), the Justice League was alerted to the situation. Supergirl, Green Arrow and Question investigated, and found Galatea, Nuvo-Gen's clone of Supergirl.