质量水平
检测方案
≥99.0% (titration)
形式
crystalline
储存条件
dry at room temperature
颜色
white
pH值(酸碱度)
2.5-5.0 (25 °C, 213.3 g/L)
有效pH范围
6.4-7.8
pKa (25 °C)
7.1
溶解性
water: 0.5 g/mL, clear, colorless
密度
1.30 g/cm3 at 20—25 °C
1.35 g/cm3 at 20—25 °C
应用
clinical research
diagnostic assay manufacturing
general analytical
life science and biopharma
储存温度
room temp
SMILES字符串
OCCN(CCO)CCS(O)(=O)=O
InChI
1S/C6H15NO5S/c8-4-1-7(2-5-9)3-6-13(10,11)12/h8-9H,1-6H2,(H,10,11,12)
InChI key
AJTVSSFTXWNIRG-UHFFFAOYSA-N
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一般描述
N,N-双(2-羟乙基)-2-氨基乙磺酸,即BES,是一种两性离子缓冲液,是生物化学研究中具有重要价值的二级标准物质。BES是一种含磺酸的交联剂,可在磺化聚酰亚胺膜中诱导磺化聚酰亚胺链之间的交联。BES缓冲液的有效pH范围是6.4-7.8。它是20世纪60年代开发的“良好”缓冲液之一,可在6.15-8.35的pH范围内产生缓冲作用,广泛用于生化研究。BES缓冲液适用于需要形成磷酸钙-DNA复合物的体系(吸光度: < 在260 nm处为0.05,100 mM)。另外,BES缓冲液可用于分子生物学、生物缓冲液、分子生物学试剂和两性离子化合物的研究。
应用
另外,BES在转染研究中也有应用,包括转染试剂的制备和与神经黑色素受体相关的信号传导分析。
在人黑素瘤细胞的结合测定期间,BES可用作改良Eagle′培养基中的结合缓冲液。它可以用作生物缓冲剂来研究异金属CuII/Li 3D配位聚合物的水性介质自组装过程。
特点和优势
- 适用于细胞培养基和在生化和分子生物学研究中用作缓冲溶液
- pKa为7.1(25 °C),可在pH 2.5-5.0(25 °C,213.3 g/L)内有效缓冲
- 经测试,确认重金属含量很低,确保适用于各种应用
WGK
WGK 3
闪点(°F)
Not applicable
闪点(°C)
Not applicable
个人防护装备
dust mask type N95 (US), Eyeshields, Gloves
Second-stage dissociation of N,N-bis (2-hydroxyethyl)-2-aminoethanesulfonic acid (?bes?) in water and in 50 mass per cent methanol+ water from 278.15 to 328.15 K.
The Journal of Chemical Thermodynamics, 9(4), 325-332 (1977)
Water sorption, proton conduction, and methanol permeation properties of sulfonated polyimide membranes cross-linked with N, N-bis (2-hydroxyethyl)-2-aminoethanesulfonic acid (BES).
Macromolecules, 39(2), 755-764 (2006)
Inorganic chemistry, 51(9), 5224-5234 (2012-04-10)
The facile aqueous medium reactions of copper(II) nitrate with BES biobuffer [(HOCH(2)CH(2))(2)N(CH(2)CH(2)SO(3)H), hereinafter referred as H(3)bes] in the presence of various benzenecarboxylic acids [benzoic (Hba), 3-hydroxybenzoic (Hhba), and 3,5-dihydroxybenzoic (Hdhba) acid] and lithium hydroxide gave rise to the self-assembly generation
Proceedings of the National Academy of Sciences of the United States of America, 74(2), 565-569 (1977-02-01)
Purified mouse nerve growth factor (NGF)radiolabeled with 125I was tested for its ability to bind to a variety of different cultured cells. NGF binds readily to human and hamster melanoma cells but does not bind to many other cell lines.
Methods in enzymology, 484, 267-279 (2010-11-03)
The two neural melanocortin receptors (MCRs), melanocortin-3 and -4 receptors (MC3R and MC4R), are G protein-coupled receptors expressed primarily in the brain that regulate different aspects of energy homeostasis. The MCRs are unique in having endogenous antagonists, agouti and agouti-related
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