mentioned: alkaline phosphatase (AP), ELISA immunoassay, horseradish peroxidase (HRP)
https://doi.org/10.1351/goldbook.09669
Conjugate that has an enzyme bound covalently.
Example: Various reporter enzymes, such as horseradish peroxidase (HRP), alkaline phosphatase (AP), and many others can be attached to antibodies. Key substance in ELISA immunoassay.