Conversion of Phenylalanine into Tyrosine by Portulaca Callus
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چکیده
منابع مشابه
Conversion of phenylalanine into tyrosine by portulaca callus.
The incorporation of [(14)C]phenylalanine and [1,6-(14)C]shikimic acid into tyrosine was investigated in the callus of Portulaca grandiflora, var. JR (L.). By inhibiting phenylalanine with 1-alpha-aminooxy-beta-phenyl-propionic acid and tyrosinase with 1-cysteine-HCl and hydrazine-hydrate, the possible synthesis of tyrosine from phenylalanine was demonstrated. Tetrahydropterine sulfate was an e...
متن کاملThe enzymatic conversion of phenylalanine to tyrosine.
The enzymatic oxidation of phenylalanine to tyrosine has been studied as part of an investigation of the intermediates and enzyme systems involved in the biosynthesis of epinephrine. Womack and Rose (1) indicated that phenylalanine was converted to tyrosine in viva by showing that tyrosine is not essential when sufficient phenylalanine is available. Definite proof was provided by Moss and Schoe...
متن کاملDegradation of Phenylalanine and Tyrosine by Sporobolomyces
Ammonia-lyase activity for L-phenylalanine, m-hydroxyphenylalanine and L-tyrosine was demonstrated in cell-free extracts ofSporobolomyces roseus. Cultures of this organism converted DL-[ring-14C]phenylalanine and L-[U-14C]tyrosine into the corresponding cinnamic acid. Tracer studies showed that these compounds were further metabolized to [14C]protocatechuic acid. Benzoic acid andp-hydroxybenzoi...
متن کاملTyrosine and Phenylalanine Ammonia Lyase Activities during Shoot Initiation in Tobacco Callus Cultures.
Both phenylalanine ammonia lyase and tyrosine ammonia lyase were detected in tobacco (Nicotiana tabacum L. Wisconsin 38) callus. The enzymes were separated from each other by Sephadex G-200 column chromatography. Increased activity of tyrosine ammonia lyase was observed during culture of tobacco callus under shoot-forming conditions, while activity of phenylalanine ammonia lyase increased durin...
متن کاملDetermination of phenylalanine and tyrosine by liquid chromatography/mass spectrometry.
Phenylketonuria is a common metabolic disorder disease. Those affected appear normal at birth, but without treatment they develop severe psychomotor retardation. Throughout life, they must control their blood levels of phenylalanine (Phe) and consume a diet containing adequate amounts of Phe and tyrosine (Tyr). We have developed a liquid chromatographic/mass spectrometric (LC/MS) method for the...
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ژورنال
عنوان ژورنال: Plant Physiology
سال: 1981
ISSN: 0032-0889,1532-2548
DOI: 10.1104/pp.68.2.272