While pigmentation refers to the natural coloration of the skin, hair, and eyes caused by melanin, hyperpigmentation describes the the process of excess of melanin production caused by various factors ...

Metabolic pathways articles from across Nature Portfolio Metabolic pathways are enzyme-mediated biochemical reactions that lead to biosynthesis (anabolism) or breakdown (catabolism) of natural ...

However, the NF-κB and IKK pathways do not exist in isolation and there are many mechanisms that integrate their activity with other cell-signalling networks.