The present invention relates to bispecific antibodies comprising a modified C-terminal crossfab fragment that have reduced or no reactivity against preexisting antidrug antibodies.

Mice, embryos, cells, and tissues having a restricted immunoglobulin heavy chain locus and an ectopic sequence encoding one or more ADAM6 proteins are provided. In various embodiments, mice are described that have humanized endogenous immunoglobulin heavy chain loci and are capable of expressing an ADAM6 protein or ortholog or homolog or functional fragment thereof that is functional in a male mouse. Mice, embryos, cells, and tissues having an immunoglobulin heavy chain locus characterized by a single human V.sub.H gene segment, a plurality of human D.sub.H gene segments and a plurality of human J.sub.H gene segments and capable expressing an ADAM6 protein or ortholog or homolog or functional fragment thereof are also provided.

The present invention relates to a low-molecular antibody composed of D-amino acids and achiral glycine, a method for producing the same, and a method for screening the low-molecular antibody using a mirror-image target protein corresponding to a target protein and an antibody library.

The invention relates to multispecific antibody constructs comprising Fab fragments having a particular set of mutations at the interface of the CH1 and CL domains, the mutations preventing heavy chain/light chain mispairing.

A method for producing a dual function protein includes a biologically active protein and an FGF21 mutant protein. The method allows stable production of a target protein by effectively preventing decomposition of the target protein, and thus has a high potential for commercial usage.

A method for producing a dual function protein includes a biologically active protein and an FGF21 mutant protein. The method allows stable production of a target protein by effectively preventing decomposition of the target protein, and thus has a high potential for commercial usage.

The invention discloses methods for the generation of chimaeric human—non-human antibodies and chimaeric antibody chains, antibodies and antibody chains so produced, and derivatives thereof including fully humanised antibodies; compositions comprising said antibodies, antibody chains and derivatives, as well as cells, non-human mammals and vectors, suitable for use in said methods.

A transgenic non-human animal is provided. In certain embodiments, the animal comprises a genome comprising an immunoglobulin heavy chain locus comprising: a) a transcribed gene encoding a fusion protein comprising, from N-terminus to C-terminus: i. a scaffold comprising a first binding domain; and ii. a heavy chain constant region operably linked to the scaffold; wherein the scaffold is capable of specifically binding to a target in the absence of additional polypeptides; and b) a plurality of pseudogenes that are operably linked to the transcribed gene and that donate, by gene conversion, nucleotide sequence to the part of the transcribed gene that encodes the binding domain.

The invention is directed to a bispecific chimeric antigen receptor, comprising: (a) at least two antigen-specific targeting regions; (b) an extracellular spacer domain; (c) a transmembrane domain; (d) at least one co-stimulatory domain; and (e) an intracellular signaling domain, wherein each antigen-specific targeting region comprises an antigen-specific single chain Fv (scFv) fragment, and binds a different antigen, and wherein the bispecific chimeric antigen receptor is co-expressed with a therapeutic control. The invention also provides methods and uses of the bispecific chimeric antigen receptors.

The present disclosure relates to an engineered antibody that co-engages a cell type-selective (or specific) antigen (guide) and a signaling receptor (effector) on a target cell. In some instances, the engineered antibody is capable of modulating a signaling pathway on a target cell. In other embodiments, an engineered antibody of the present disclosure is administered to a subject for the treatment of a disease or condition.