国产综合一区二区三区,99香蕉国产精品偷在线观看,性色少妇AV蜜臀人妻无码,成版人app网站

您好,歡迎進(jìn)入上海力敏實(shí)業(yè)有限公司網(wǎng)站!
一鍵分享網(wǎng)站到:
您現(xiàn)在的位置:首頁(yè) >> 產(chǎn)品中心 >> 生化試劑、抗體、血清 >> 常規(guī)生化試劑 >> A8381sigmaL-天冬酰胺

sigmaL-天冬酰胺

  • 更新時(shí)間:  2023-07-24
  • 產(chǎn)品型號(hào):  A8381
  • 簡(jiǎn)單描述
  • sigmaL-天冬酰胺
    assay

    ≥99% (TLC)

    mp

    233-235 °C(lit.)
詳細(xì)介紹

sigmaL-天冬酰胺

L-Asparagine monohydrate
Product Number A 8381
Store at Room Temperature
Product Description
Molecular Formula: C4H8N2O3 • H2O
Molecular Weight: 150.1
CAS Number: 5794-13-8
pKa: 2.14 (-COOH), 8.72 (-NH2)1
pI: 5.431
Specific Rotation: +32.6°
(10 mg/ml, 0.1 M HCl, 20 °C)
Melting Point: 234-235 °C2
Synonyms: (S)-2-aminosuccinic acid 4-amide,
L-aspartic acid 4-amide, α-aminoauccinamic acid,
aspartic acid β-amide2
The amino acid L-asparagine is a structural analog of
L-aspartic acid, where the side chain of the carboxylic
acid moiety is amidated, to give a terminal amine
group. This renders L-asparagine neutral at
physiological pH. The amide group of asparagine is
derived from glutamate, in the reaction of aspartate
and glutamine in the presence of ATP to yield
asparagine and glutamate.3 In vivo, asparagine is
hydrolyzed to aspartate and NH4
+ by asparaginase.4
Asparagine is also an important amino acid in
glycopeptide bonds, via N-glycosyl linkages to the
sugar rings.3
L-Asparagine is used in cell culture media and is a
component of MEM non-essential amino acids solution
(Product No. M 7145). L-Asparagine has been shown
to enhance ornithine decarboxylase activity in cultured
human colon adenocarcinoma Caco-2 cells and in
cultured IEC-6 intestinal epithelial cells.5,6 Spore
germination in Bacillus subtilis has been increased in
the presence of L-asparagine.7
An isoxazoline RGD mimic plaet GPIIb/IIIa
antagonist has been prepared by chiral synthesis with
L-asparagine as a starting material.8 L-Asparagine
has been utilized in the synthesis of 4-azalysine
building blocks for application to combinatorial
chemistry.9
Precautions and Disclaimer
For Laboratory Use Only. Not for drug, household or
other uses.
Preparation Instructions
This product is soluble in water (50 mg/ml), with heat
as needed, yielding a clear, colorless solution.
References
1. Molecular Biology Lab, Brown, T. A., ed., BIOS
Scientific Publishers (Oxford, UK: 1991), p. 29.
2. The Merck Index, 12th ed., Entry# 872.
3. Textbook of Biochemistry with Clinical
Correlations, 5th ed., Devlin, T. M., ed., Wiley-Liss
(New York, NY: 2002), pp. 97, 680-681, 785-786.
4. Biochemistry, 3rd ed., Stryer, L., W. H. Freeman
(New York, NY: 1988), pp. 18, 504.
5. Chabanon, H., et al., Increased translation
efficiency and antizyme-dependent stabilization of
ornithine decarboxylase in amino acidsupplemented
human colon adenocarcinoma
cells, Caco-2. Biochem. J., 348(Pt 2), 401-408
(2000).
6. Ray, R. M., et al., Interaction of asparagine and
EGF in the regulation of ornithine decarboxylase in
IEC-6 cells. Am. J. Physiol., 276(3 Pt 1), G773-
780.
7. Cabrera-Martinez, R. M., et al., Effects of
overexpression of nutrient receptors on
germination of spores of Bacillus subtilis. J.
Bacteriol., 185(8), 2457-2464 (2003).
8. Zhang L. H., et al., The Enantiospecific synthesis
of an isoxazoline. A RGD mimic plaet GPIIb/IIIa
antagonist. J. Org. Chem., 62(8), 2466-2470
(1997).
9. Chhabra, S. R., et al., Homochiral 4-azalysine
building blocks: syntheses and applications in
solid-phase chemistry. J. Org. Chem., 67(12),
4017-4029 (2002).
GCY/RXR 8/03
Sigma brand

 


sigmaL-天冬酰胺 詳細(xì)產(chǎn)品信息可和選購(gòu)


留言框

  • 產(chǎn)品:

  • 您的單位:

  • 您的姓名:

  • 聯(lián)系電話:

  • 常用郵箱:

  • 省份:

  • 詳細(xì)地址:

  • 補(bǔ)充說(shuō)明:

  • 驗(yàn)證碼:

    請(qǐng)輸入計(jì)算結(jié)果(填寫阿拉伯?dāng)?shù)字),如:三加四=7
露娜拿的金箍棒玩自己视频| 打开这个网站你会感谢我的| 40岁成熟女人牲交片20分钟| 久久久婷婷五月亚洲97号色| 和60岁女人做下面好松| 群体交乱之放荡娇妻a片视频 | 亚洲熟妇无码av无码| 教子做爰xxxx| 宝贝小嫩嫩好紧好爽h在线视频| 99久久精品国产亚洲av| 老汉的性生生活1一7| 最新的zoom动物马| 哭着说不能再c了再c就生了| 寡妇玩xxxxxx猛男吃奶| 国产成人亚洲精品无码A大片| 欧美最猛性XXXXXX| 白洁被高振干到九点多| 夜夜精品无码一区二区三区| 精品少妇人妻av无码专区偷人| 被粗大噗嗤噗嗤进出灌满浓浆| 亚洲 欧美 动漫 少妇 自拍| 少妇高潮惨叫久久久久久| 永久免费无码网站在线观看个 | 亚洲色成人一区二区三区小说| 中文字幕AV人妻一区二区| 狠狠色综合网站久久久久久久| 两根好爽好大好深快爽死我| 国产chinesehdxxxx宾馆tube| 久久日本片精品AAAAA国产| 亚洲精品蜜桃久久久久久| 无遮真人祼交视频| 苍井そら无码av| 在线观看免费A∨网站| 4438全国大成网人网站| 亚洲欧美精品午睡沙发| 欧美猛交xxx无码黑寡妇| 伊人久久大香线蕉AV色婷婷色| 亚洲精品无码乱码成人| 中文字字幕乱码视频| 精品亚洲成a人在线观看| 大乳丰满人妻中文字幕日本|