Transgenic mammals having human Ig loci including plural V H...

Multicellular living organisms and unmodified parts thereof and – Nonhuman animal – Transgenic nonhuman animal

Reexamination Certificate

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C800S013000, C800S006000

Reexamination Certificate

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07064244

ABSTRACT:
The present invention relates to transgenic non-human animals that are engineered to contain human immunoglobulin gene loci. In particular, animals in accordance with the invention possess human Ig loci that include plural variable (VHand Vκ) gene regions. Advantageously, the inclusion of plural variable region genes enhances the specificity and diversity of human antibodies produced by the animal. Further, the inclusion of such regions enhances and reconstitutes B-cell development to the animals, such that the animals possess abundant mature B-cells secreting extremely high affinity antibodies.

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