The present invention provides a composition of the formula: [FGF21-1st Linker]-[Ab]-[2nd-Linker-Ex4]; wherein FGF21 is an FGF21 homologue; and Ex4 is an Exendin4 homologue; and Ab is an aldolase catalytic antibody or antigen binding portion thereof; and the 1st linker is covalently attached to the side chain of a protein-linking residue in FGF21 and to a combining site of the antibody, and the 2nd linker is covalently attached to the side chain of a peptide-linking residue in Ex4 and to a combining site of the antibody, and wherein the first and second linker are the same or different. Various uses of the compounds are provided, including methods to prevent or treat diabetes or diabetes-related conditions.本發明提供一種下式之組合物:[FGF21-第一連接子]-[Ab]-[第二連接子-Ex4];其中FGF21為FGF21同系物;且Ex4為腸促胰島素類似物4同系物;且Ab為醛縮酶催化抗體或其抗原結合部分;且該第一連接子共價連接至FGF21中之蛋白質鍵聯殘基之側鏈及該抗體之組合位點,並且該第二連接子共價連接至Ex4中之肽鍵聯殘基之側鏈及該抗體之組合位點,且其中該第一連接子與該第二連接子相同或不同。提供該等化合物之各種用途,包括用於預防或治療糖尿病或糖尿病相關病狀之方法。