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Cy7 NHS ester (non-sulfonated)

 
Catalog No.
A8104
氨基反应性荧光染料,不溶于水
组合的产品项目
规格价格库存 数量
5mg
¥ 6,949.00
现货
25mg
¥ 13,642.00
现货

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A

背景

Cy7 NHS ester, also called Cy7 monofunctional N-hydroxysuccinimide ester or Cy7-NHS [1], is a near-infrared fluorescent [2] and soluble sulfonated cyanine dye [3] with a molecular weight of 828 Da[2], able to be dissolved in DMSO [1] and ready for conjugation to proteins [4]. Cy7 NHS ester acts as a donor of Cy7 [5]. Cy7 has an emission maximum at 767nm, an absorption maximum at 743nm and its ε743=200,000 cm-1M-1 [4]. Compared with Cy5.5, Cy7 has fewer sulfonate groups and an extra methine group that contributes to hydrophobicity. Antibodies labeled with either Cy7 or Cy5.5 succinimidyl esters have similar quenching efficiencies [5].

N-acylation can occur between a Cy7 NHS ester and a primary amino group. This type of reaction is also widely used to allow amide formation under milder conditions without base or coupling reagent [6]. Most derivatives of non-sulfonated cyanines have low aqueous solubility except for hydrochlorides of hydrazides and amines. For biomolecule labeling, using of organic co-solvent (5-20% of DMF or DMSO) to dissolve this molecular 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.

Incubated with Cy7 NHS, LS174T cells showed negligible signals in fluorescent microscopic images, it illustrated that possibility of nonspecific binding between free Cy7 and LS174T cells was negligible [1].

In vivo, injection of Cy7-NHS for 15 minutes resulted in the fluorescent signal in the whole body of a mouse bearing LS174T tumors, but from the blank mouse, no autofluorescence was detected. This result suggested the rapid distribution of Cy7 NHS in the body of the mouse. Subsequently, Cy7 NHS was rapidly eliminated from the kidney and no fluorescence was detected on the mouse 96 hours post-injection [1].

References:
[1].  Peng Zou, Songbo Xu, Stephen P. Povoski, et al. Near-Infrared Fluorescence Labeled Anti-TAG-72 Monoclonal Antibodies for Tumor Imaging in Colorectal Cancer Xenograft Mice. Mol Pharm., 2009, 6(2): 428-440.
[2].  Martin L. Brady, Raghu Raghavan, Deep Singh, et al. In vivo performance of a microfabricated catheter for intraparenchymal delivery. Journal of Neuroscience Methods, 2014, 229: 76-83.
[3].  Valeri Metelev, Surong Zhang, David Tabatadze, et al. The three-dimensional context of a double helix determines fluorescence of the internucleoside-tethered pair of fluorophores. Mol Biosyst., 2013, 9(10): 2447-2453.
[4].  Manfred Birchler, Giovanni Neri, Lorenzo Tarli, et al. Infrared photodetection for the in vivo localisation of phage-derived antibodies directed against angiogenic markers. Journal of Immunological Methods, 1999, 231: 239-248.
[5].  Benedict Law, Alejandro Curino, Thomas H. Bugge, et al. Design, Synthesis, and Characterization of Urokinase Plasminogen-Activator-Sensitive Near-Infrared Reporter. Chemistry & Biology, 2004, 11: 99-106.
[6].  M. Bai and D.J. Bornhop. Recent Advances in Receptor-Targeted Fluorescent Probes for In Vivo Cancer Imaging. Current Medicinal Chemistry, 2012, 19(1): 1-17.

文献引用

化学属性

Physical AppearanceA solid
Storage24 months after receival at -20°C in the dark. Transportation: at room temperature for up to 3 weeks. Avoid prolonged exposure to light. Desiccate.
M.Wt733.64
Cas No.1432019-64-1
FormulaC41H48BF4N3O4
Solubility≥34.1 mg/mL in DMSO
SDFDownload SDF
Canonical SMILESCC1(C)C(/C=C/C(CCC/2)=CC2=C\C=C3N(C)C4=CC=CC=C4C\3(C)C)=[N+](CCCCCC(ON(C5=O)C(CC5)=O)=O)C6=CC=CC=C61.FB(F)F.[F-]
运输条件 蓝冰运输或根据您的需求运输。
一般建议不同厂家不同批次产品溶解度各有差异,仅做参考。若实验所需浓度过大至产品溶解极限,请添加助溶剂助溶或自行调整浓度。溶液形式一般不宜长期储存,请尽快用完。

Spectral properties

最大激发光波 (nm) 750 最大发射光波 (nm) 773
消光系数 (M-1cm-1) 199000 量子产量 0.3
CF260 0.022 CF280 0.029

质量控制

化学结构

Cy7 NHS ester

相关生物数据

Cy7 NHS ester (non-sulfonated)

相关生物数据

Cy7 NHS ester (non-sulfonated)