[Southack]

I don't know what blocks it, but...NF-κB (nuclear factor kappa-light-chain-enhancer of activated B cells) is a protein complex that controls the transcription of DNA itself.

NF-κB is found in almost all animal cell types and is involved in cellular responses to stimuli such as stress, cytokines, free radicals, ultraviolet irradiation, oxidized LDL, and bacterial or viral antigens.

NF-κB plays a key role in regulating the immune response to infection (kappa light chains are critical components of immunoglobulins).

Incorrect regulation of NF-κB has been linked to cancer, inflammatory and autoimmune diseases, septic shock, viral infection, and improper immune development.

In brief, NF-κB can be understood to be a protein responsible for cytokine production and cell survival.

[Enterprise]

Thank you. It didn’t really surprise me though that the substance itself wasn’t named. Maybe a search could turn up some information.