Below is an instruction from Human. Write a response.
    ### Instruction:
    What is (are) Tyrosinemia type 1 ?
    ### Response:
    Tyrosinemia type 1 is a genetic disorder characterized by elevated blood levels of the amino acid tyrosine, a building block of most proteins. This condition is caused by a shortage of the enzyme fumarylacetoacetate hydrolase, one of the enzymes required for the multi-step process that breaks down tyrosine.
    