Patent ID: 8581021

Claim:
A genetically modified pig, porcine blastocyst, embryo, fetus, donor cell and/or cell nucleus, whose genome comprises at least one heterologous site-specific recombination site for insertion of at least one transgene and further comprises a transposon tag, wherein said recombination site and transposon tag are inserted in the genome using a recombinant target vector comprising a DNA-transposon based construct, and/or a genetically modified porcine blastocyst, embryo, fetus, donor cell and/or cell nucleus derived from said genetically modified pig, wherein the genome of the derived pig, porcine blastocyst, embryo, fetus, donor cell and/or cell nucleus comprises at east one heterologous site-specific recombination site for insertion of at least one transgene and further comprises a transposon tag.