pediatrics
Tyrosine Metabolism Disorders
Introduction
Tyrosine is an amino acid that is a precursor of several neurotransmitters (eg,dopamine,norepinephrine,epinephrine), hormones (eg, thyroxine), and melanin; deficiencies of enzymes involved in its metabolism lead to a variety of syndromes. There are numerous disorders of phenylalanine and tyrosine metabolism (see the Phenylalanine and Tyrosine Metabolism Disorders ). See also 