尿刊酸 MSDS3-(4-Imidazolyl)acrylic acid
Human Endogenous Metabolite
Urocanic acid (UCA) is formed in the upper layers of the epidermis where filaggrin, a histidine-rich filamentous protein produced after caspase-14 cleavage of profilaggrin, is broken down by proteinases into component amino acids.