Phosphotyrosine Polyclonal Antibody, HRP - FAQs

Do preparations of Invitrogen HRP-conjugated antibodies contain sodium azide?

HRP is inhibited by sodium azide, so the HRP-conjugated antibodies do not contain this agent.

Unconjugated antibodies are, however, supplied in solutions containing sodium azide.

Find additional tips, troubleshooting help, and resources within our Protein Assays and Analysis Support Center.