<prompt> Phenylalanine is degraded intoFumarate and succinateFumarate and acetoacetateFumarate and MalateFumarate and pyruvate  <response>: Phenylalanine is first conveed to tyrosine For Subsequent metabolism of phenylalanine and tyrosine See att. Treasure. Hereditary tyrosinemia type I Hepatorenal tyrosinemia is due to deficiency of the enzyme fumaryl acetoacetate hydrolase fumarylacetoacetase. Remember the enzyme deficiency - fumarylacetoacetase. That will help you to remember the end products - Fumarate and acetoacetate. Phenylalanine tyrosine are both glucogenic and ketogenic. Fumarate is glucogenic while acetoacetate is ketogenic. 