Zinc protoporphyrin-9 is a potent, selective heme oxygenase inhibitor, interleukin-1 antagonist, GCS inhibitor, and NOS1, NOS2, and NOS3 inhibitor. In olfactory neuronal cultures, this product has been used to block CO biosynthesis, which lowered cGMP concentrations. Zinc protoporphyrin-9 is an extremely useful tool to elucidate the role of CO in signal transduction and as a neurotransmitter.

This Thermo Scientific Chemicals brand product was originally part of the Alfa Aesar product portfolio. Some documentation and label information may refer to the legacy brand. The original Alfa Aesar product / item code or SKU reference has not changed as a part of the brand transition to Thermo Scientific Chemicals.