Abstract: The invention provides heterodimer bispecific antigen-binding molecules that include a first polypeptide that does not include an IgG CH1 domain and a second polypeptide where there is at least one mutation in the IgG CH3 domain that abolishes the ability of the second polypeptide to bind CH3-specific affinity media such that the first and second polypeptides have different affinities with respect to CH1 and CH3 specific affinity reagents that allows rapid isolation by differential binding. The invention also provides bispecific antibodies that have CH1 and CH3 regions with different affinities with respect to affinity reagents that allows rapid isolation by differential binding. The invention also concerns bispecific antibodies which are heterodimers of two IgG heavy chains that differ by at least two amino acids that allow for rapid isolation based on a differential affinity of one mutated heavy chain and a second mutated heavy chain toward two different affinity reagents.

Abstract: The invention relates to antigen-binding proteins or antibodies having heterodimers of heavy chains, i.e., two immunoglobulin heavy chains that differ by at least one or two amino acid(s) that allows for isolation of the antigen-binding protein based on a differential affinity of an immunoglobulin heavy chain and a modified/mutated immunoglobulin heavy chain toward an affinity reagent. The invention also relates antigen-binding proteins, including bispecific antibodies, having IgG CH1 regions with different affinities with respect to affinity reagent(s) that allows rapid isolation by differential binding of the IgG regions to the affinity reagent(s).

Abstract: The invention relates to antigen-binding proteins or antibodies having heterodimers of heavy chains, i.e., two immunoglobulin heavy chains that differ by at least one or two amino acid(s) that allows for isolation of the antigen-binding protein based on a differential affinity of an immunoglobulin heavy chain and a modified/mutated immunoglobulin heavy chain toward an affinity reagent. The invention also relates antigen-binding proteins, including bispecific antibodies, having IgG CH1 regions with different affinities with respect to affinity reagent(s) that allows rapid isolation by differential binding of the IgG regions to the affinity reagent(s).

Abstract: Methods are provided to improve the expression of protein complexes by tuning the expression levels of each component required for the assembly of the complex. These methods are effective in limiting the expression of the dominant chain and, thus, equilibrating their relative abundance. The methods provided herein lead to a significant increase in productivity and final bispecific yields both in transient expression systems as well as in stably transfected mammalian cells.

Abstract: Methods are provided to improve the expression of protein complexes by tuning the expression levels of each component required for the assembly of the complex. These methods are effective in limiting the expression of the dominant chain and, thus, equilibrating their relative abundance. The methods provided herein lead to a significant increase in productivity and final bispecific yields both in transient expression systems as well as in stably transfected mammalian cells.

Abstract: The invention relates to antigen-binding proteins or antibodies having heterodimers of heavy chains, i.e., two immunoglobulin heavy chains that differ by at least one or two amino acid(s) that allows for isolation of the antigen-binding protein based on a differential affinity of an immunoglobulin heavy chain and a modified/mutated immunoglobulin heavy chain toward an affinity reagent. The invention also relates antigen-binding proteins, including bispecific antibodies, having IgG CH1 regions with different affinities with respect to affinity reagent(s) that allows rapid isolation by differential binding of the IgG regions to the affinity reagent(s).

Abstract: The invention relates to antigen-binding proteins or antibodies having heterodimers of heavy chains, i.e., two immunoglobulin heavy chains that differ by at least one or two amino acid(s) that allows for isolation of the antigen-binding protein based on a differential affinity of an immunoglobulin heavy chain and a modified/mutated immunoglobulin heavy chain toward an affinity reagent. The invention also relates antigen-binding proteins, including bispecific antibodies, having IgG CH1 regions with different affinities with respect to affinity reagent(s) that allows rapid isolation by differential binding of the IgG regions to the affinity reagent(s).

Abstract: Methods are provided to improve the expression of protein complexes by tuning the expression levels of each component required for the assembly of the complex. These methods are effective in limiting the expression of the dominant chain and, thus, equilibrating their relative abundance. The methods provided herein lead to a significant increase in productivity and final bispecific yields both in transient expression systems as well as in stably transfected mammalian cells.

Abstract: The invention provides heterodimer bispecific antigen-binding molecules that include a first polypeptide that does not include an IgG CH1 domain and a second polypeptide having an immunoglobulin constant region where there is at least one mutation in the IgG CH3 domain that abolishes the ability of the second polypeptide to bind CH3-specific affinity media such that the first and second polypeptides have different affinities with respect to CH1 and CH3 specific affinity reagents that allows rapid isolation by differential binding of the first and second polypeptides to these affinity reagents. The invention also provides bispecific antibodies that have IgG CH1 and CH3 regions with different affinities with respect to affinity reagents that allows rapid isolation by differential binding of the IgG regions to these affinity reagents. The invention also concerns bispecific antibodies which are heterodimers of heavy chains, i.e.

Abstract: The invention relates to antigen-binding proteins or antibodies having heterodimers of heavy chains, i.e., two immunoglobulin heavy chains that differ by at least one or two amino acid(s) that allows for isolation of the antigen-binding protein based on a differential affinity of an immunoglobulin heavy chain and a modified/mutated immunoglobulin heavy chain toward an affinity reagent. The invention also relates antigen-binding proteins, including bispecific antibodies, having IgG CH1 regions with different affinities with respect to affinity reagent(s) that allows rapid isolation by differential binding of the IgG regions to the affinity reagent(s).