Abstract: The present invention relates to antibody conjugates, and methods of manufacturing the same. In particular, the present invention relates to a conjugate comprising an antibody, a linker and at least one active agent, wherein: the linker connects the at least one active agent(s) to the antibody; ii) the linker is attached to the antibody through 5 to 8 independent covalent bonds; and iii) each covalent bond between the linker and the antibody is formed from the reaction between a sulfur atom on the antibody and a functional group on the linker.

Abstract: A conjugate comprising a protein or a peptide, a linker and an active agent, wherein the linker comprises the moiety of formula (III): (III) wherein two of A1, A2 and A3 are N and the other of A1, A2 and A3 is CH; X is selected from N, O and S, and Pep indicates where the moiety is linked to the protein or peptide, either directly or indirectly.