Table 1.

Antibody conjugate categories.

Antibody Conjugate	Payload	Description
Antibody-toxin conjugates	Toxin	Commonly referred to as immunotoxin in the cancer immunotherapy field, ATC is characterized by the conjugation of toxins usually derived from plants or bacteria.
Antibody-radionuclide conjugates	Radionuclide	Antibody-radionuclide conjugate is the conjugation of a radionuclide to an antibody carrier
Antibody-drug conjugates	Small molecule or compounds	Antibody-drug conjugate is the conjugation of small molecule drugs to antibodies.
Antibody-oligonucleotide conjugates	Oligonucleotides such as siRNA	Conjugation of oligonucleotide-based payloads such as siRNA
Antibody-photosensitizer	Photosensitizers	Antibody-photosensitizer conjugates, also known as photoimmunotherapy (PIT), is a targeted photodynamic therapy designed with a conjugated photosensitizer to a mAb.