Study of interfering substances in a simple, new spectrophotometric assay for phenylalanine ammonia-lyase

A study of interfering substances in a new spectrophotometric assay for phenylalanine ammonia-lyase was made. None of the commonly interfering compds. interfered in the assay to any significant extent. The assay was employed for the partial purifn. of the enzyme from mint leaves (Mentha viridis).