نتایج جستجو برای: Phenylalanine ammonia-lyase enzyme

تعداد نتایج: 284924  

Journal: :علوم باغبانی ایران 0
سمیه قاسمی عمران دانشجوی سابق کارشناسی ارشد، دانشکده علوم کشاورزی دانشگاه گیلان محمود قاسم نژاد استادیار، دانشکده علوم کشاورزی دانشگاه گیلان عبداله حاتم زاده دانشیار دانشکده علوم کشاورزی دانشگاه گیلان داود بخشی استادیار دانشکده علوم کشاورزی دانشگاه گیلان

the close to impossible correct controlling of the temperature and light intensity is the main limiting factors of growing plants in the plastic covered greenhouses. quality and vase life of cut flowers are mostly influenced by greenhouse temperature. alstroemeria needs cold temperature for growth and flowering. in the current study, the such changes in vase life and flower quality as stem leng...

Salinity is an important environmental factor that limits plant growth and production. Grape is classified as salt sensitive plants. The object of this study was to evaluate effects of salinity on membrane lipid peroxidation, antioxidant components, and antioxidative enzymes activity in ten grape genotypes native to the regions around Urmia Salt Lake.Malondialdehyde content and protective enzym...

Journal: :The Journal of biological chemistry 1976
R R Fritz D S Hodgins C W Abell

Yeast phenylalanine ammonia-lyase (EC 4.3.1.5) catalyzes the deamination of L-phenylalanine to form trans-cinnamic acid and tyrosine to trans-coumaric acid. Maximal enzyme activity in Rhodotorula glutinis (2 units/g, wet weight, of yeast) was induced in late-log phase (12 to 14 hours) of growth in a culture medium containing 1.0% malt extract, 0.1% yeast extract, and 0.1% L-phenylalanine. A hig...

Journal: :Plant physiology 1981
K Hahlbrock C J Lamb C Purwin J Ebel E Fautz E Schäfer

Large and rapid increases in the activities of two enzymes of general phenylpropanoid metabolism, phenylalanine ammonia-lyase and 4-coumarate:CoA ligase, occurred in suspension-cultured parsley cells (Petroselinum hortense) treated with an elicitor preparation from Phytophthora megasperma var. sojae. Highest enzyme activities were obtained with an elicitor concentration similar to that required...

Journal: :Plant physiology 1969
M Zucker

A cycloheximide-sensitive increase in the activity of phenylalanine ammonia-lyase (EC 4.3.1.5) occurs in Xanthium leaf disks exposed to light. Radioactive ammonia-lyase has been isolated by means of sucrose density gradient centrifugation and starch gel electrophoresis from disks fed l-isoleucine-U-(14)C or l-arginine-U-(14)C. The incorporation of radioactive amino acids into phenylalanine ammo...

2006
Rong - sen Shen Richard R. Fritz Creed W. Abell

Yeast phenylalanine ammonia-lyase was administered i.p. to normal and tumor-beaning mice, and its clearance from plasma was studied. Single and multiple weekly injections at dosages of 10, 20, 50, and 100 units/kg were adminis tered to C57BL female, C57BL x DBA/2 F male, and A/J female mice. L5178Y munine lymphoblastic leukemia, B16 melanoma, BW10232 adenocancinoma, and 15091A ana plastic carci...

2006
C. W. Abell W. J. Stith D. S. Hodgins

Phenylalanine ammonia-lyase, which irreversibly deaminates phenylalanine and tyrosine, markedly inhibited the growth of human leukemic and murine L5178Y lymphoblasts in vitro but had a negligible effect on resting (nondividing) normal lymphocytes. These studies also demonstrated that phenylalanine ammonia-lyase inhibited DNA synthesis in leukemic cells at least as effectively as did asparaginas...

Journal: :Cancer research 1972
C W Abell W J Stith D S Hodgins

Phenylalanine ammonia-lyase, which irreversibly deaminates phenylalanine and tyrosine, markedly inhibited the growth of human leukemic and murine L5178Y lymphoblasts in vitro but had a negligible effect on resting (nondividing) normal lymphocytes. These studies also demonstrated that phenylalanine ammonia-lyase inhibited DNA synthesis in leukemic cells at least as effectively as did asparaginas...

Journal: :Plant physiology 1974
A J Podstolski G N Brown

Influences of light and darkness on l-phenylalanine ammonia-lyase activity of black locust (Robinia pseudoacacia) seedlings were studied. Light initiates both an increase in enzyme activity (or enzyme synthesis) and a subsequent decrease in activity. These dual influences of light create cyclic changes in l-phenylalanine ammonia lyase activity in continuous light. The cyclic changes in activity...

Journal: :Zeitschrift fur Naturforschung. Section C, Biosciences 1976
W Löffelhardt

The photosynthetic procaryote Anacystis nidulans converts L-phenylalanine and L-tyrosine into benzoic acid and p-hydroxybenzoic acid, respectively. Results obtained with thylakoid fractions support the hypothesis that the reaction sequence is catalyzed by thylakoid-bound enzyme complexes consisting of phenylalanine ammonia-lyase and benzoate synthase of tyrosine ammonia-lyase and p-hydroxybenzo...

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