| CPC C07K 16/244 (2013.01) [A61K 39/395 (2013.01); A61K 47/6845 (2017.08); A61K 47/6849 (2017.08); A61P 35/00 (2018.01); C07K 16/2809 (2013.01); C07K 16/30 (2013.01); C07K 16/46 (2013.01); A61K 2039/505 (2013.01); C07K 2317/31 (2013.01); C07K 2317/35 (2013.01); C07K 2317/52 (2013.01); C07K 2317/522 (2013.01); C07K 2317/53 (2013.01); C07K 2317/55 (2013.01); C07K 2317/64 (2013.01); C07K 2317/76 (2013.01); C07K 2317/92 (2013.01); C07K 2317/94 (2013.01)] | 23 Claims | 
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               1. An antigen-binding molecule comprising: 
            (a) a first polypeptide chain comprising, in an N- to C-terminal orientation: 
                (i) a first Fc domain; 
                  (ii) a first linker; 
                  (iii) a first VH domain; and 
                  (iv) a first CH1 domain; 
                (b) a second polypeptide chain comprising, in an N- to C-terminal orientation: 
                (i) a second Fc domain; 
                  (ii) a second linker; 
                  (iii) a second VH domain; and 
                  (iv) a second CH1 domain; 
                (c) a third polypeptide chain comprising a universal light chain, wherein the third polypeptide is associated with the first VH domain and the first CH1 domain to form a first Fab; and 
                (d) a fourth polypeptide chain comprising a universal light chain, wherein the fourth polypeptide is associated with the second VH domain and the second CH1 domain to form a second Fab. 
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