374 results

... the individual to carry out the oxidation of phenylalanine to tyrosine. I think that it would be ... the study of the enzyme-catalyzed oxidation of phenylalanine, probably with beef liver as the starting material, ...

... one degenerate codon. Although 100 per cent of phenylalanine tRNA binds to ribosomes in the presence of ... by streptomycin as discussed earlier. The replacement of phenylalanine by leucine, a well-documented in vitro ambiguity, ...

... chemistry that prevents assimilation of an amino acid (phenylalanine), found in most pro- tein foods. When a ... was started on a special diet low in phenylalanine to pre- vent the build-up of the ...

... with a specific block in the metabolism of phenylalanine, enabled the inference that lowering phenylalanine intake might have a useful effect in controlling ...

... alcapton or homogentisic acid), a metabolic derivative of phenylalanine. Unlike their normal counterparts who further degrade alcapton, ... intermediate compounds in the sequence of reactions between phenylalanine and alcapton. In a like manner he characterized ...

... leucine and thiamin, and Y-24, requiring biotin, phenylalanine and cystine. These strains were . grown in mixed ... and single mutant types requiring only thiamin or phenylalanine. In addition, double requirement types have been obtained, ...

... of threonine, leucine and thiamine; a second biotin, phenylalanine and cystine), there arose among the progeny a ... leucitin - B.D.D.), methionine, proline, threonine and phenylalanine. (2) The ability to ferment several compounds, lactose ...

... the biochemical screening of blood samples: for high phenylalanine in the detection of phenylketonuria and for the ... G.L.C. Method for the Determination of Phenylalanine in Serum," J. Anal. Biochem. (in press, 1969). ...

... Gas-Liquid Chromatographic Method for the Determination of Phenylalanine in Serum," Anal. Biochem. 31, 227 (1969). 19 ... W. Pereira and B. Halpern, "The Modification of Phenylalanine Containing Cyclo-Peptides with Nitrosyl Chloride," Aust. J. ...

... strain #58-278? This strain is the biotin-phenylalanine strain. Treffers,has been using this strain investigating ... and the small ones require neither biotin nor phenylalanine but do require norvaline. We thought it might ...