A commonly used method for conjugating HRP to antibodies is by activation of the HRP using sodium meta-periodate (Cat no. 20504) to generate aldehydes. After the reaction, the HRP must be dialyzed to remove the meta-periodate; then the aldehydes on the HRP will react directly to the amine groups on the antibody. Alternatively, we offer activated HRP (Cat. No. 31488) as an alternative to avoid the periodate oxidation step to modify the HRP.
Find additional tips, troubleshooting help, and resources within our Protein Purification and Isolation Support Center.