PHENY LALANIHE·FREE LOW- PHENYLALANINE DIET 15-39· TYROSINE 49.PHENY 1a上 ih。u tyrosine y。sine go 60 2。F --N。 RMAL LEVEM.少 VEL 28 26 25 50o PHEN ANI PHEN RUY IO0ELEYEL 4i0 l18263iB DEC JAN FEB MARCH NOV. DEC 1s51 1352 Biochemical reactions to phenyialaninefree and to: lowphenylalanine diet