sentences:  Tyrosine aminotransferase
  
  Tyrosine aminotransferase (or tyrosine transaminase) is an enzyme present in the liver and catalyzes the conversion of tyrosine to 4-hydroxyphenylpyruvate.L-tyrosine + 2-oxoglutarate formula_1 4-hydroxyphenylpyruvate + L-glutamate
  
  In humans, the tyrosine aminotransferase protein is encoded by the "TAT" gene.