Caffeine synthase gene from tea leaves
نویسندگان
چکیده
منابع مشابه
Extraction and isolation of Caffeine from tea leaves
General background and overview of the experiment: Humankind has historically used advantageous compounds derived from plants and animals. For instance, various extracts from plants have been used as teas, potions, medicines and poisons. Though these extracts can contain a mixture of many different chemicals, often only one or few are responsible for the activity of the extract. For decades suc...
متن کامل[Frontiers in Bioscience 9, 1833-1842, May 1, 2004] 1833 CAFFEINE SYNTHASE AND RELATED METHYLTRANSFERASES IN PLANTS
1. Abstract 2. Introduction 3. N-methyltransferases involved in caffeine biosynthesis 3.1. N-methyltransferase activity in cell free preparations 3.2. Purification of caffeine synthase from tea leaves 3.3. Molecular cloning of caffeine synthase gene from tea leaves 3.4. The orthologous genes in coffee 3.5. The characteristic future of N-methyltransferase in theobromineaccumulating species 4. Ca...
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Background: Two of the important radionuclides which are entered to environment and human diet are radium-226 (226Ra) and cesium-137 (137Cs). It is clear that the methods for preparation of foods such as peeling, washing, cooking or frying can affect the dose which is received by human due the to consumption of foodstuffs. An experiment has been performed at the environmental monitoring section...
متن کاملSeparation of polyphenols and caffeine from the acetone extract of fermented tea leaves (Camellia sinensis) using high-performance countercurrent chromatography.
Leaves from Camellia sienensis are a popular natural source of various beverage worldwide, and contain caffeine and polyphenols derived from catechin analogues. In the current study, caffeine (CAF, 1) and three tea polyphenols including (-)-epigallocatechin 3-O-gallate (EGCg, 2), (-)-gallocatechin 3-O-gallate (GCg, 3), and (-)-epicatechin 3-O-gallate (ECg, 4) were isolated and purified by flow-...
متن کاملAltered expression of the caffeine synthase gene in a naturally caffeine-free mutant of Coffea arabica
In this work, we studied the biosynthesis of caffeine by examining the expression of genes involved in this biosynthetic pathway in coffee fruits containing normal or low levels of this substance. The amplification of gene-specific transcripts during fruit development revealed that low-caffeine fruits had a lower expression of the theobromine synthase and caffeine synthase genes and also contai...
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ژورنال
عنوان ژورنال: Nature
سال: 2000
ISSN: 0028-0836,1476-4687
DOI: 10.1038/35023072