There are several types of antibody conjugates, each serving a unique purpose in histology: - Fluorescent Antibody Conjugates: These are antibodies linked to fluorescent dyes, used for immunofluorescence microscopy. - Enzyme-linked Antibody Conjugates: These involve antibodies linked to enzymes such as horseradish peroxidase (HRP) or alkaline phosphatase (AP), used in immunohistochemistry. - Radioactive Antibody Conjugates: These are antibodies linked to radioactive isotopes, used in radioimmunoassays and radioimmunotherapy.