definiens: shall mean : ( a ) the Cattle Field ; ( b ) the Goat Field ; ( c ) the production, use andlor sale of transgenic or chimeric mice, rabbits, pigs, andlor sheep ( including their respective embryos, gametes and/or progeny ) for the production of Biopharmaceuticals in the milk ( including any fraction thereof ) secreted from such transgenic or chimeric animals ; and ( d ) the use in any transgenic or chimeric cattle, goats, mice, rabbits, pigs, andlor sheep of a nucleic acid construct useful in the production of a system that includes the use of a recombinant casein 3 Confidentjal ;) promoter sequence, which permits a female transgenic or chimeric animal to produce a desired Biopharmaceutical in the milk ( or any fraction thereof ) of such a transgenic or chimeric cattle, goats, mice, rabbits, pigs, and/or sheep during lactation