Conjugation of Antibodies to Horseradish Peroxidase

Antibodies conjugated with horseradish peroxidase (HRP) are one of the most widely used bioreagents in the biological sciences. This protocol is a basic method for adding HRP to a thiolated antibody and can be adapted for use with different cross-linkers. Conjugation methods usually focus on linking through the lysines on HRP because there are only six of them and their modification does not adversely affect enzyme activity.