... amino acids include isoleucine, leucine, lysine, methi- onine, phenylalanine, threonine, tryptophan, and valine. The amino acid cystine ... tyrosine can replace part of the requirement for phenylalanine. Histidine is an essential amino acid for infants, ...

... et al.. .2.Ql.5.). Melphalan Melphalan (L-phenylalanine mustard) was, with chlorambucil, one of the first ... its synthesis in 1953 was that the L-phenylalanine part of the melphalan molecule would serve as ...

... on Al2 only 38" Bg SY-23 "on Phenylalanine, tyrosine ({ both) a9. " Bll "4 (aa “a - 4 ... V. Pen Am-1 L 38. SY-23 " Phenylalanine e# tyrosine L 396 " " Proline 40. " " Histidine 41. ...

... on Al2 only 38" Bg SY-23 "on Phenylalanine, tyrosine ({ both) a9. " Bll "4 (aa “a - 4 ... V. Pen Am-1 L 38. SY-23 " Phenylalanine e# tyrosine L 396 " " Proline 40. " " Histidine 41. ...

... requiring one or more “aromatic metabolites’! such as phenylalanine, tyrosine, tryptophan or shikimic acid have been isolated ... related to the metabolism of aromatic amino acids: phenylalanine, tyrosine, tryptophan, or p-aminobenzoic acid. Genetics 48: ...

... polynucleotide, polyuridylic acid,? on incorpora- tion of C-phenylalanine. In the absence of poly U, very little phenylalanine was incorporated into protein. Addition of 10 pg ...

... Methionine 9 64 0 9 15 4 12 Phenylalanine 152 606 86 64 14 0 10 Proline ... 23 6 Methionine 1 4 0 0 10 Phenylalanine 0 0 1 6 9 Proline 147 320 ... Methionine 0 10 0 0 0 0 10 Phenylalanine 0 0 1 0 4 0 1l Proline ...

... U of average chain length 11 actively directs phenylalanine incorporation (Marcus et al., 1963). Although cer- tain ... amino acid into protein are shown. For example, phenylalanine is directed into protein by poly U and ...

... 4 0.000(1)4 0..008(1) Phenylalanine... ...... 0.003 (1) Electrophoretic mo- bility... .........2-- Acidic ... 087(1) | 0.037 (1) 0.081(1) Phenylalanine........ 0.085(1) | 0.068(1) Electrophoretic mo-| ...

... in the liver, which catalyzes the oxidation of phenylalanine to tyrosine, or produces an abnormal enzyme, with ... have in their tissues abnormally high concentrations of phenylalanine and some of its reaction products, which cause ...