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Merck

A2929

Sigma-Aldrich

琼脂糖

For pulsed field electrophoresis running gel

别名:

3,6-Anhydro-α-L-galacto-β-D-galactan

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About This Item

CAS号:
EC號碼:
MDL號碼:
分類程式碼代碼:
41105317
PubChem物質ID:
NACRES:
NA.25

生物源

algae (red)

形狀

powder

技術

electrophoresis: suitable

雜質

≤10% water

EEO

≤0.10

轉變溫度

gel point 38-43 °C (10% gel)

凝膠強度

≥2000 g/cm2

負離子痕跡

sulfate (SO42-): ≤0.20%

異物活動

DNase, RNase, NICKase, none detected

InChI

1S/C24H38O19/c25-1-5-9(27)11(29)12(30)22(38-5)41-17-8-4-36-20(17)15(33)24(40-8)43-18-10(28)6(2-26)39-23(14(18)32)42-16-7-3-35-19(16)13(31)21(34)37-7/h5-34H,1-4H2/t5-,6-,7+,8+,9+,10+,11+,12-,13+,14-,15+,16-,17-,18+,19+,20+,21-,22+,23+,24+/m1/s1

InChI 密鑰

MJQHZNBUODTQTK-WKGBVCLCSA-N

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特異性

适用于分离高分子量的 DNA。与常规琼脂糖相比,倒转电场电泳使得凝胶更容易处理,分离更快速,高分子量 DNA 的分离度更好。

應用

专为脉冲场凝胶电泳 (PFGE) 或传统电泳快速分离较大 DNA 片段 (10-2000kb) 而配制。脉冲场凝胶电泳法于 1984 年建立,用于处理大小超出分辨率界限且以相同速率迁移的较大 DNA 片段爬行。在凝胶周围施加了交替脉冲、正交定向的电场。每次电场方向改变,较大的 DNA 片段需要沿着新电场重新定向,否则无法继续迁移。重新定向所需时间取决于 DNA 的大小,因此 DNA 根据大小被分离。

特點和優勢

  • 低电渗可以升高电压,使 DNA 迁移更快速。
  • 凝胶强度更高,使得低浓度凝胶稳定性更好,从而导致 DNA 迁移更快。
  • 使用了溴化乙锭染料,因此凝胶具有低背景荧光。

分析報告

以下是与我们的琼脂糖相关的性质列表:
硫酸盐含量 - 用作纯度指标,因为硫酸盐是其中存在的主要离子基团。
凝胶强度 - 破裂凝胶所需施加的力。
胶凝点 - 琼脂糖水溶液在冷却时的胶凝温度。 琼脂糖溶液在液体-凝胶转变的过程中会表现出滞后现象 - 也就是说,它们的凝胶点与它们的熔点温度不同。
电内渗(EEO)- 液体通过凝胶的一种运动。琼脂糖凝胶中的阴离子基团被固定在基质上不能移动,但可解离的抗衡阳离子可以向基质中的阴极迁移,从而产生EEO。 由于生物聚合物的电泳运动通常是朝向阳极的,因此EEO会因为内部的对流而破坏分离。

儲存類別代碼

11 - Combustible Solids

水污染物質分類(WGK)

WGK 3

閃點(°F)

Not applicable

閃點(°C)

Not applicable

個人防護裝備

Eyeshields, Gloves, type N95 (US)


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