Chemicals, biochemical, biotechnological and bacteriological products namely, polypeptides for in vivo and invitro genetic engineering, natural and engineered meganuclease and endonuclease, nucleic acid vectors encoding the natural or engineered meganuclease or endonuclease or nucleic acid vectors comprising their recognition and cleavage site; ready to use genomic recombination system comprised primarily of reagents for scientific use; cells engineered by meganuclease recombination systems f...