Phenylalanine conversion to tyrosine . Comparative determination with l- ['RING'- 'ANTPOT.2 H IND.5'] phenylalanine and l-' [1-C] POT.13' phenilalanine as tracers in man - Marchini, Julio Sergio; Castillo, L; Chapman, T E; Vogt, J A; Ajami, A; Young, V R (Metablism, 1993)