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由于Cy染料的结构式特点,他们往往有着极高的消选光系数,数值高达100,000 Lmol-1cm-1
Cy系列的荧光染料我们一般分为磺酸化菁染料和非磺酸化菁染料non-sulfonated cyanines, and sulfonated cyanines.他们的光谱性质基本相同,和蛋白 小分子修饰反应也几乎是一样的,唯一不同的在于他们的溶解性,非磺酸化菁染料是脂溶性的,磺酸化菁染料是水溶性的,结构式上也会有些不同。
Non-sulfonated cyanines非磺酸化菁染料包括以下:
Cy3.5 alkyne、Cy3 azide、Cy3 carboxylic acid、Cy3 NHS ester、Cy5 amine、Cy5 maleimide
Cyanine3 alkyne azide carboxylic acid hydrazide maleimide NHS ester
Cyanine3.5 alkyne azide carboxylic acid hydrazide maleimide NHS ester
Cyanine5 alkyne azide carboxylic acid hydrazide maleimide NHS ester amine
Cyanine5.5 alkyne azide carboxylic acid hydrazide maleimide NHS ester amine
Cyanine7 alkyne azide carboxylic acid hydrazide maleimide NHS ester amine
Cyanine7.5 alkyne azide carboxylic acid hydrazide maleimide NHS ester amine
大多数非磺酸化菁染料都必须在有机相里去跟蛋白、多肽、抗体及小分子材料进行下一步的反应。
Sulfonated cyanine磺酸化菁染料包括以下:
Sulfo-Cy 5 NHS ester, Sulfo-Cy3 maleimide, Sulfo-Cy7 azide, Sulfo-Cy5 carboxylic acid
Sulfo Cyanine3 alkyne azide carboxylic acid hydrazide maleimide NHS ester
Sulfo Cyanine3.5 alkyne azide carboxylic acid hydrazide maleimide NHS ester
Sulfo Cyanine5 alkyne azide carboxylic acid hydrazide maleimide NHS ester amine
Sulfo Cyanine5.5 alkyne azide carboxylic acid hydrazide maleimide NHS ester amine
Sulfo Cyanine7 alkyne azide carboxylic acid hydrazide maleimide NHS ester amine
Sulfo Cyanine7.5 alkyne azide carboxylic acid hydrazide maleimide NHS ester amine
虽然非磺酸化菁染料和磺酸化菁染料有着相同的荧光特性,但是在具体使用上还是有一些差异性的,非磺酸化菁染料必须溶解在有机溶剂中如DMF或DMSO中使用,并加入缓冲水溶液buffers来使用,磺酸化菁染料溶解在水中,整个使用过程完全在水相中进行。
Most derivatives of non-sulfonated cyanines (except for hydrochlorides of hydrazides and amines) have low aqueous solubility. When these molecules are used for biomolecule labeling, use of organic co-solvent (5-20% of DMF or DMSO) is necessary for efficient reaction. Cyanine dye should be dissolved in organic solvent first, and added to a solution of biomolecule (protein, peptide, amino-labeled DNA) in appropriate aqueous buffer. When conjugation takes place efficiently, the dye reacts before it precipitates.
Fluorescent properties of non-sulfonated cyanines have little dependence on solvent and surrounding. Absorbance and fluorescence spectra of non-sulfonated cyanine dyes are plotted below.
磺酸化菁染料和非磺酸化菁荧光染料可以用于标记各种不同的目标分子:
l 可在有机溶剂中溶解的蛋白质
l 抗体 (use 5-10% of DMSO/DMF)
l DNA和寡核苷酸
l 多肽
l 其他小分子,包括药用小分子及抑制剂
磺酸化菁荧光染料可用于:
Ø 在DMF或DMSO中变性的敏感蛋白
Ø 被透析及纯化的蛋白
Ø 水溶性的纳米粒子
Ø 不溶或疏水的蛋白
非磺酸化菁荧光染料可用于:
Ø 在有机介质反应(二氯甲烷、乙腈)
西安瑞禧生物科技有限公司经营的磺酸化菁染料和非磺酸化菁荧光染料纯度高达95%以上,并可以因为质量无条件退换货。
非磺酸化菁荧光染料产品列表:
Cy3 alkyne azide carboxylic acid hydrazide maleimide NHS ester
Cy3.5 alkyne azide carboxylic acid hydrazide maleimide NHS ester
Cy5 alkyne azide carboxylic acid hydrazide maleimide NHS ester amine
Cy5.5 alkyne azide carboxylic acid hydrazide maleimide NHS ester amine
Cy7 alkyne azide carboxylic acid hydrazide maleimide NHS ester amine
Cy7.5 alkyne azide carboxylic acid hydrazide maleimide NHS ester amine
磺酸化菁荧光染料产品列表:
Sulfo Cy3 alkyne azide carboxylic acid hydrazide maleimide NHS ester
Sulfo Cy3.5 alkyne azide carboxylic acid hydrazide maleimide NHS ester
Sulfo Cy5 alkyne azide carboxylic acid hydrazide maleimide NHS ester amine
Sulfo Cy5.5 alkyne azide carboxylic acid hydrazide maleimide NHS ester amine
Sulfo Cy7 alkyne azide carboxylic acid hydrazide maleimide NHS ester amine
Sulfo Cy7.5 alkyne azide carboxylic acid hydrazide maleimide NHS ester amine
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