寡妇好丰满奶好大有声小说,免费观看性生交大片 ,亚洲精品无码久久久久秋霞,爱的色放在线

您好,歡迎進入上海力敏實業(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 >> 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

  • 更新時間:  2023-07-24
  • 產(chǎn)品型號:  A8381
  • 簡單描述
  • sigmaL-天冬酰胺
    assay

    ≥99% (TLC)

    mp

    233-235 °C(lit.)
詳細介紹

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 詳細產(chǎn)品信息可和選購


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:

  • 詳細地址:

  • 補充說明:

  • 驗證碼:

    請輸入計算結果(填寫阿拉伯數(shù)字),如:三加四=7
overflow樱花动漫| 久久天天躁狠狠躁夜夜av| 久久久久99精品成人片直播| 国产av躁一二三区免费播放| 欲妇荡岳丰满少妇a片24小时| 男女差差差差差打扑克视频| 韩国无码AV片在线观看网站| 偷看娇妻在别人胯下沦陷小说| 亚洲av无一区二区三区| 亚洲午夜精品一区二区| 超级yin荡的高中女学生h | 熟女肥臀白浆大屁股一区二区| 丰满护士巨好爽好大乳小说| 亚洲色综合狠狠综合区| 国产精品婷婷久久爽一下| 国产人妻精品一区二区三区不卡| 疯狂揉肉蒂高潮h失禁视频| 一女被五男在别墅调教| 色婷婷7777免费视频在线观看| 台湾佬中文网| 国产精品福利一区二区| 蜜桃成熟1997| 日日碰狠狠躁久久躁少妇熟女人妻| chinese熟女老太hd| 激情综合五月| 男男肠道灌水失禁play| 巨大乳尖奶怀孕| 挺进绝色校花的紧窄小肉| 成人女人爽到高潮的a片 | 奶头被民工吸的又大又黑| 99蜜桃臀久久久欧美精品网站 | 肉欲公车系500章| 老熟女高潮喷水了| 国产高清视频一区二区三区| 够力七星彩排列五奖表最新版本 | 另类sm一区二区三区免费视频| 迈开腿让我看看你的草莓| 被老师摸着jj勃起有14厘米| 亚洲精品无码| 99久久久无码国产精品不卡 | 波多野结衣在线观看|