Abstract: Non-human animals, and methods and compositions for making and using the same, are provided, wherein said non-human animals comprise a humanization of an endogenous cluster of differentiation (CD) gene, in particular a humanization of a CD47 gene. Said non-human animals may be described, in some embodiments, as having a genetic modification to an endogenous CD47 gene so that said non-human animals express a CD47 polypeptide that includes a human portion and a non-human portion (e.g., a murine portion).

Abstract: Disclosed herein are non-human animals (e.g., rodents, e.g., mice or rats) genetically engineered to express a humanized or human T cell receptor (TCR) comprising a variable domain encoded by (a) at least one human TCR variable region ? gene segment and a (human) TCR ? constant region gene sequence and/or (b) or at least one human TCR variable region ? gene segment and a (human) TCR ? constant region gene sequence. Also provided are embryos, tissues, and cells expressing the same. Methods for making a genetically engineered animal that expresses the humanized or human ? and/or ? TCR are also provided. Methods for using the genetically engineered animals that mount a substantially humanized T cell immune response for developing human therapeutics are also provided.

Abstract: Non-human animals, and methods and compositions for making and using the same, are provided, wherein said non-human animals comprise a humanization of an endogenous cluster of differentiation (CD) gene, in particular a humanization of a CD47 gene. Said non-human animals may be described, in some embodiments, as having a genetic modification to an endogenous CD47 gene so that said non-human animals express a CD47 polypeptide that includes a human portion and a non-human portion (e.g., a murine portion).

Abstract: Non-human animals, tissues, cells, and genetic material are provided that comprise a modification of an endogenous non-human heavy chain immunoglobulin sequence and that comprise an ADAM6 activity functional in a mouse, wherein the non-human animals express a human immunoglobulin heavy chain variable domain and a cognate human immunoglobulin ? light chain variable domain.

Abstract: Genetically modified non-human animals expressing human SIRP? and human IL-15 from the non-human animal genome are provided. Also provided are methods for making non-human animals expressing human SIRP? and human IL-15 from the non-human animal genome, and methods for using non-human animals expressing human SIRP? and human IL-15 from the non-human animal genome. These animals and methods find many uses in the art, including, for example, in modeling human T cell and/or natural killer (NK) cell development and function, in modeling human pathogen infection of human T cells and/or NK cells, and in various in vivo screens.

Abstract: Genetically modified mice and methods and compositions for making and using the same are provided, wherein the genetic modification comprises humanization of an Fc?RI protein.

Abstract: Genetically modified non-human animals comprising a humanized interleukin-15 (IL-15) gene. Cells, embryos, and non-human animals comprising a human IL-15 gene. Rodents that express humanized or human IL-15 protein.

Abstract: Non-human animals, tissues, cells, and genetic material are provided that comprise a modification of an endogenous non-human heavy chain immunoglobulin sequence and that comprise an ADAM6 activity functional in a mouse, wherein the non-human animals express a human immunoglobulin heavy chain variable domain and a cognate human immunoglobulin ? light chain variable domain.

Abstract: Non-human animals, tissues, cells, and genetic material are provided that comprise a modification of an endogenous non-human heavy chain immunoglobulin sequence and that comprise an ADAM6 activity functional in a mouse, wherein the non-human animals express a human immunoglobulin heavy chain variable domain and a cognate human immunoglobulin ? light chain variable domain.

Abstract: Genetically modified non-human animals expressing human SIRP? and human IL-15 from the non-human animal genome are provided. Also provided are methods for making non-human animals expressing human SIRP? and human IL-15 from the non-human animal genome, and methods for using non-human animals expressing human SIRP? and human IL-15 from the non-human animal genome. These animals and methods find many uses in the art, including, for example, in modeling human T cell and/or natural killer (NK) cell development and function, in modeling human pathogen infection of human T cells and/or NK cells, and in various in vivo screens.

Abstract: The invention provides a genetically modified non-human animal that comprises in its genome unrearranged T cell receptor variable gene loci, as well as embryos, cells, and tissues comprising the same. Also provided are constructs for making said genetically modified non-human animal and methods of making the same. Various methods of using the genetically modified non-human animal are also provided.

Abstract: The invention provides a genetically modified non-human animal that comprises in its genome unrearranged T cell receptor variable gene loci, as well as embryos, cells, and tissues comprising the same. Also provided are constructs for making said genetically modified non-human animal and methods of making the same. Various methods of using the genetically modified non-human animal are also provided.

Abstract: Genetically modified mice and methods and compositions for making and using the same are provided, wherein the genetic modification comprises humanization of an Fc?RI protein.

Abstract: Genetically modified non-human animals comprising a humanized interleukin-15 (IL-15) gene. Cells, embryos, and non-human animals comprising a human IL-15 gene. Rodents that express humanized or human IL-15 protein.

Abstract: The present invention provides isolated T cell receptors (TCRs) that specifically bind to an HLA-displayed cancer testis antigen Melanoma-Associated Antigen A4 (MAGE-A4) peptide, as well as therapeutic and diagnostic methods of using those isolated TCRs. The present invention provides T cell receptors (TCRs) that were generated against a MAGE-A4 peptide antigen in the context of MHC (HLA-A2). The unique TCR sequences identified have shown specific binding to the small peptide MAGE-A4 presented in the groove of an HLA molecule and exhibited activation of T cells in a reporter assay.

Abstract: The invention provides genetically modified non-human animals that express chimeric human/non-human MHC I and MHC II polypeptides and/or human or humanized ?2 microglobulin polypeptide, as well as embryos, cells, and tissues comprising the same. Also provided are constructs for making said genetically modified animals and methods of making the same. Methods of using the genetically modified animals to study various aspects of human immune system are provided.

Abstract: Disclosed herein are rodents (such as, but not limited to, mice and rats) genetically modified to comprise a humanized Tslp gene, a humanized Tslpr gene, a humanized 117ra gene, or a combination thereof. Compositions and methods for making such genetically modified rodents, as well as methods of using such genetically modified rodents as an animal model for diseases such as allergic diseases and cancer are provided.

Abstract: Genetically modified mice and methods for making an using them are provided, wherein the mice comprise a replacement of all or substantially all immunoglobulin heavy chain V gene segments, D gene segments, and J gene segments with at least one light chain V gene segment and at least one light chain J gene segment. Mice that make binding proteins that comprise a light chain variable domain operably linked to a heavy chain constant region are provided. Binding proteins that contain an immunoglobulin light chain variable domain, including a somatically hypermutated light chain variable domain, fused with a heavy chain constant region, are provided. Modified cells, embryos, and mice that encode sequences for making the binding proteins are provided.

Abstract: Disclosed herein are non-human animals (e.g., rodents, e.g., mice or rats) genetically engineered to express a humanized T cell co-receptor (e.g., humanized CD4 and/or CD8 (e.g., CD8? and/or CD8?)), a human or humanized T cell receptor (TCR) comprising a variable domain encoded by at least one human TCR variable region gene segment and/or a human or humanized major histocompatibility complex that binds the humanized T cell co-receptor (e.g., human or humanized MHC II (e.g., MHC II ? and/or MHC II ? chains) and/or MHC I (e.g., MHC I?) respectively, and optionally human or humanized ?2 microglobulin). Also provided are embryos, tissues, and cells expressing the same. Methods for making a genetically engineered animal that expresses at least one humanized T cell co-receptor (e.g., humanized CD4 and/or CD8), at least one humanized MHC that associates with the humanized T cell co-receptor (e.g., humanized MHC II and/or MHC I, respectively) and/or the humanized TCR are also provided.

Abstract: Disclosed herein are genetically modified rodent animals comprising in their genome a nucleic acid which comprises a nucleotide sequence encoding a human CR1 polypeptide, wherein the rodent animals display a human-like expression of the human CR1 polypeptide. Also disclosed herein are isolated rodent cells including rodent embryonic stem cells, and rodent tissues. Further disclosed are nucleic acid vectors and methods for making the genetically modified rodent animals, as well as methods of using such genetically modified rodent animals for screening and testing candidate compounds.