Influence of Monovalent Cations on the Activity of l-Serine (l-Threonine) Dehydratase from Rat Liver. The Control of Threonine-Serine Activity Ratio
نویسندگان
چکیده
منابع مشابه
Isolation and Properties of a Homogeneous Preparation of Cystathionine Synthetase-l-serine and L-threonine Dehydratase.
Selim and Greenberg (1, 2) achieved a considerable degree of purification of L-serine dehydratase (L-serine hydro-lyase (deaminating), EC 4.2.1.13) from rat liver and demonstrated that this protein preparation contained the cystathionine-synthesizing activity of the liver (L-serine hydro-lyase (adding L-homocysteine), EC 4.2.1.21). These workers (2) also observed activity of their enzyme prepar...
متن کاملMetabolic homoeostasis of L-threonine in the normally-fed rat. Importance of liver threonine dehydrogenase activity.
Threonine dehydratase, threonine aldolase and threonine dehydrogenase activities were assayed in livers of rats that had been normally-fed, starved for 72 h, fed a high-protein diet or normally-fed and injected with glucagon or cortisone. A modified continuous spectrophotometric assay for threonine aldolase overcame interference resulting from threonine dehydratase activity and revealed that th...
متن کاملThe reversible inactivation of L-threonine hydratase of sheep liver by L-serine.
The action of partially purified L-threonine dehydratase of sheep liver on L-serine has been studied. This enzyme acts on L-serlne as a substrate but is rapidly inactivated in the process, partially at pH 8.9 and more completely at pH 7.2. However, incubation at pH 8.9, with or without L-threonine, leads to a gradual restoration of up to 90% of the original activity. The addition of pyridoxal p...
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بر اساس نظریه افلاطون در باره شعر خلاقیت هنری مورد انتقاد قرار گرفته است. نظریه کلی در مورد شعر این بود که شعر از ظواهرتقلید میکند و نه حقیقت. چون سایه ای از حقیقت است. اما با پیدایش فلسفه نو افلاطونی، انتقاتات قبلی در مورد شعر و شاعری اصلاح شد. فلوطین در کتاب انئید، اساس خلق هنری را بر محور مُثل افلاطونی قرار داد. وی باور داشت که هنر مندان در خلق آثار هنری، تحت تاثیر مُثل افلاطونی بوده و عوالمی ...
comparison of catalytic activity of heteropoly compounds in the synthesis of bis(indolyl)alkanes.
heteropoly acids (hpa) and their salts have advantages as catalysts which make them both economically and environmentally attractive, strong br?nsted acidity, exhibiting fast reversible multi-electron redox transformations under rather mild conditions, very high solubility in polar solvents, fairly high thermal stability in the solid states, and efficient oxidizing ability, so that they are imp...
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ژورنال
عنوان ژورنال: European Journal of Biochemistry
سال: 1972
ISSN: 0014-2956,1432-1033
DOI: 10.1111/j.1432-1033.1972.tb01849.x