Below is an instruction from Human. Write a response.
    ### Instruction:
    What is (are) mitochondrial trifunctional protein deficiency ?
    ### Response:
    Mitochondrial trifunctional protein deficiency is a rare condition that prevents the body from converting certain fats to energy, particularly during periods without food (fasting).  Signs and symptoms of mitochondrial trifunctional protein deficiency may begin during infancy or later in life.
    