x
uploads/tryptophan.jpg

tryptophan n.【生物化學】色氨酸。

tryptophane

The 1 : 1 inclusion complexes of - cyclodextrin with phenylalanine and tyrosine were formed ; but 2 : 1 complex was afford from - cyclodextrin with tryptophan owing to the various sites and chaps of different amino acids . the inclusion behaviors of - cyclodextrin and its polylactide - garfted copolymer with insulin were also studied via ultraviolet and fluorescent spectrometry 隨著?環糊精用量的增加和作用時間的延長, ?壞糊精對芳香族氨基酸的包合作用增強,揭示了?環糊精與芳香族氨基酸包合物在水溶液中的形成是一動態平衡過程。

The product chorismate of this pathway is precursor to the synthesis of the aromatic amino acids phenylalanine , tyrosine , and tryptophan as well as other essential aromatic secondary metabolites such as ubiquinone , menaquinone and vitamin k . phosphoenolpyruvate and shikimate 3 - phophate are converted to 5 - enolpyruvlshimimate - 3 - phosphate and phosphate 芳香族氨基酸苯丙氨酸、酪氨酸、色氨酸和其它一些必需代謝物如泛醌、維生素k2類、維生素k的起始物是莽草酸途徑所產生的分枝酸。

Induced either by iptg or l - tryptophan in the absence of easily metabolized carbon such as glucose the strain bl21 ( de3 ) / pet28c - tnaa can express tryptopanase . the fermentation conditions were optimized respectively . in the presence of glucose and iptg as induce agent , the concentration is the crucial factor for expression of active tryptophanase . if the iptg concentration is less than 0 . 2mm , the optimum temperature is 37 lower temperature is necessary to obtain active tryptophanase in the case of higher concentration of iptg 用iptg誘導表達實驗結果表明:利用t7啟動子在胞內能表達出有活性的酶; iptg與溫度的合適組合可以得到較高活性的色氨酸酶,在0 . 2mm以下濃度的iptg誘導時, 37是最適溫度,而用較高濃度的iptg誘導,低溫是表達有活性的色氨酸酶的必要條件,而且誘導時間要短。

Complex carbohydates as well as certain food components such as folic acid , omega - 3 fatty acids , selenium and tryptophan are thought to decrease depression symptoms . some studies have found correlations between low fish intake in populations and high levels of depression . there is also evidence that a factor behind the growth of alzheimer ' s is the increase in diets high in saturated fat and low in vitamins and minerals 炭水化合物和一些食物成分,如葉酸omega - 3脂肪酸硒和色氨酸等,被認為可以緩解抑郁癥一些研究還發現,經常吃海產品可以防止抑郁癥的發生也有證據表明,阿耳茨海默癥發病率上升的其中一個原因是攝入太多含有飽和脂肪酸的食物,同時維生素和礦物質的攝入量又過少另外,缺乏氨基酸也會導致抑郁,大腦必須利用氨基酸來制造神經遞質。

The inclusion behaviors of b - cyclodextrin with some aromatic amino acids such as l - phenylalanine , l - tyrosine and l - tryptophan were studied via ultraviolet and fluorescent spectrometry . the results indicated that inclusion complexes of - cyclodextrin with aromatic amino acids could be formed and the inclusion behaviors were affected by the amount of - cyclodextrin , temperature and ph value 本文研究了?環糊精與芳香族氨基酸l ?苯丙氨酸、 l ?酪氨酸和l ?色氨酸之間的包合作用,考察了?環糊精用量、溫度、時間和ph值等因素對包合作用的影響。

This reaction is catalyzed by dahp synthase , which in microorganisms is also the target for negative - feedback regulation of the pathway mediated either by the pathway intermediate chorismate , or by endproducts phenylalanine , tyrosine and tryptophan 在大腸桿菌中, arog基因編碼受苯丙氨酸反饋抑制的dahp合成酶同工酶arog ,催化e4p和pep反應生成dahp 。

It also had common features of plant nsltps ( non - specific lipid transfer proteins ) such as eight conserved cysteine positions , high isoelectric points ( 8 . 9 ) and lack of tryptophans 其推測的氨基酸序列與genbank中注冊的ltp蛋白前體的同源性達63 ,且具有植物lh蛋白共同特征,如8個保守的半肌氨酸位點,較高的等電點oi 8

Crystal growth of cac2o4 was induced mainly by amino acids after the addition of certain concentration of amino acids ( tryptophan , tyrosine , asparticacid ) to op / oia / ch / water reverse microemulsions 向該微乳體系中分別加入一定濃度的氨基酸(色氨酸、酪氨酸、天冬氨酸)后,草酸鈣晶體生長主要被氨基酸誘導。

Total and free plasma concentrations of tryptophan decreased 73 % in both patients and controls during tryptophan depletion and increased approximately 60 % on the day of supplementation 患者和對照的總血漿色氨酸濃度與游離色氨酸濃度在色氨酸缺失期均下降73 ,在補充色氨酸的當天大約增加60 。

L - tryptophan is a neutral , genetically coded amino acid . iit is essential in human nutrition . formed from proteins during the digestive process by the action of proteolytic enzymes 色氨酸是一種重要的中性必需氨基酸,在消化過程中,通過蛋白水解作用酶的運動而由蛋白質形成。

Baseline levels of tryptophan were measured on that day and patients completed a questionnaire , answering questions about ibs symptoms and symptoms of anxiety and depression 之后測量色氨酸的基線水平,并讓患者完成一份問卷調查,回答一些關于ibs的癥狀和焦慮抑郁癥狀的問題。

Serum levels of 5 - ht and tryptophan were significantly lower in patients with depression who had a recent suicide attempt than in those patients who had never attempted suicide 血清5 -羥色胺與色氨酸濃度,最近有自殺意圖病人比從未有自殺意圖病人顯著偏低。

Aromatic metabolites such as tryptophan , phenylalanine , tyrosine which can only be synthesized by plants and microbes are essential amino acids for human and animals 芳香族氨基酸包括酪氨酸、苯丙氨酸和色氨酸,是人體和動物體內的必需氨基酸。

Researchers recently discovered that a nutrient called tryptophan , present in figs , may make this fruit the perfect late - night snack to promote sound sleep 研究員近日發現在無花果里有一種稱為色氨酸的營養成分,可使其成為最佳宵夜也有助于睡眠。

Warm milk contains some tryptophan ( a kind of amino acid which will bring calmness effect ) and calcium . calcium is heplful for brain to utilize typtophan fully 溫牛奶含有一些色胺酸(具有鎮靜作用的一種氨基酸)和鈣,鈣有利于大腦充分利用色胺酸。

Ibs patients reported more gastrointestinal symptoms but less anxiety with acute tryptophan increase compared with acute tryptophan depletion 急性色氨酸增加期和急性色氨酸缺失期比較, ibs患者胃腸道癥狀更多,而焦慮減少。

For example , tryptophan from foods such as yogurt , milk , bananas , and eggs is required for the production of the neurotransmitter serotonin 例如,來自諸如酸奶、牛奶、香蕉和雞蛋的色氨酸會產生神經遞質的血清素。

During acute tryptophan depletion , subjects drank the same drink without the addition of tryptophan 在急性色氨酸缺失期,受試者飲用不加色氨酸的其他成分相同的飲料。

All amino acids except methionine and tryptophan are specified by two or more codons 除蛋氨酸和色氨酸外的所有氨基酸可根據兩種或兩種以上基碼確定。