Fumarylacetoacetase/FAH Protein is a key enzyme in the metabolism of phenylalanine and tyrosine expressed primarily in the liver. Deficiency of FAH causes hereditary tyrosinemia type 1. Fumarylacetoacetase/FAH Protein, Human (HEK293, His) is the recombinant human-derived Fumarylacetoacetase/FAH protein, expressed by HEK293 , with C-6*His labeled tag.