Isolated human chromosome 14 fragment encoding immunoglobulin genes
The specification relates to a method for producing a chimeric non-human animal, which comprises preparing a microcell containing a foreign chromosome(s) or a fragment(s) thereof and transferring the foreign chromosome(s) or fragment(s) thereof into a pluripotent cell by fusion with the microcell; a chimeric non-human animal which can be produced by the above method and its progeny; tissues and cells derived therefrom; and a method for using the same. Further, a pluripotent cell containing a foreign chromosome(s) or a fragment(s) thereof, a method for producing the same, and a method for using the same are also provided. Moreover, a pluripotent cell in which at least two endogenous genes are disrupted, and a method for producing the same by homologous recombination are provided.
1. An isolated human chromosome #14 fragment, comprising:
(i) human chromosome #14 antibody heavy chain genes IgM, IGG1, IGA2 and IGVH3 and
(ii) a centromere from human chromosome #14,
wherein said human chromosome #14 fragment (I) does not comprise gene markers D14S51, D14S62, D14S65, D14S66, D14S67, D14S72, D14S75, D14S78, D14S81, TCRA and MYH6 and (II) is stably retained in a mouse embryonic stem cell, wherein the isolated human chromosome #14 fragment SC20 deposited under Accession Number FERM BP-7583.
2. A vector for transferring a gene into a non-human animal, comprising the human chromosome #14 fragment of claim 1 .