Antigen antibody conjugation is a crucial component of biological agents used in immunoassay, detection, and targeted therapeutic research. Large, complex molecules with a molecular weight larger than 10 kDa are typically classified as antigens. It can raise levels of a particular antibody and encourage a strong immunological response. Custom antibody conjugation involves the chemical conjugation of a monoclonal or polyclonal antibody with other biomolecules. This can involve conjugating antibodies and their fragments with biologically active molecules, peptides, proteins, oligonucleotides and their analogs, or with any other molecular group that contributes useful properties, such as haptens, metal chelates, enzymes, radionuclides, toxins, and others.

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