Cyanine 3 monoacid [equivalent to Cy3® acid]

A variety of cyanine 3 (Cy3®) dyes has been used to label biological molecules for fluorescence imaging and other fluorescence-based biochemical analysis. They are widely used for labeling peptides, proteins and oligos etc. Cy3® dyes have enhanced fluorescence upon binding to proteins. Cy3® is the trademark of GE Healthcare.

Calculators

Common stock solution preparation

Table 1. Volume of DMSO needed to reconstitute specific mass of Cyanine 3 monoacid [equivalent to Cy3® acid] to given concentration. Note that volume is only for preparing stock solution. Refer to sample experimental protocol for appropriate experimental/physiological buffers.

	0.1 mg	0.5 mg	1 mg	5 mg	10 mg
1 mM	134.264 µL	671.321 µL	1.343 mL	6.713 mL	13.426 mL
5 mM	26.853 µL	134.264 µL	268.528 µL	1.343 mL	2.685 mL
10 mM	13.426 µL	67.132 µL	134.264 µL	671.321 µL	1.343 mL

Molarity calculator

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Mass (Calculate)		Molecular weight		Volume (Calculate)		Concentration (Calculate)		Moles
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Spectrum

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Product family

Name	Excitation (nm)	Emission (nm)	Extinction coefficient (cm ^-1 M ^-1)	Quantum yield	Correction Factor (260 nm)	Correction Factor (280 nm)
Cyanine 3 bisacid [equivalent to Cy3® bisacid]	555	569	150000¹	0.15¹	0.07	0.073
Cyanine 3 maleimide [equivalent to Cy3® maleimide]	555	569	150000¹	0.15¹	0.07	0.073
Cyanine 3 azide [equivalent to Cy3® azide]	555	569	150000¹	0.15¹	0.07	0.073
Cyanine 3 alkyne [equivalent to Cy3® alkyne]	555	569	150000¹	0.15¹	0.07	0.073
Cyanine 3 amine [equivalent to Cy3® amine]	555	569	150000¹	0.15¹	0.07	0.073
Cyanine 3 hydrazide [equivalent to Cy3® hydrazide]	555	569	150000¹	0.15¹	0.07	0.073
Cyanine 5 monoacid [equivalent to Cy5® acid]	651	670	250000¹	0.27¹, 0.4²	0.02	0.03
Cyanine 7 monoacid [equivalent to Cy7® acid]	756	779	250000	0.3	0.05	0.036
Cyanine-3- dUTP [Cy3-dUTP] 1 mM in TE Buffer (pH 7.5)	555	569	150000¹	0.15¹	0.07	0.073

Citations

View all 14 citations: Citation Explorer

Competitive binding-mediated mesoscale protein-protein interactions direct microtubule growth
Authors: Wei, Zhiyi and Jia, Xuanyan and Lin, Leishu and Guo, Siqi and Zhou, Lulu and Jin, Gaowei and Dong, Jiayuan and Xiao, Jinman and Xie, Xingqiao and Li, Yiming and others,
Journal: (2024)

Caveat fluorophore: an insiders’ guide to small-molecule fluorescent labels
Authors: Grimm, Jonathan B and Lavis, Luke D
Journal: Nature methods (2022): 149--158

Thermo-sensitive hydrogel PLGA-PEG-PLGA as a vaccine delivery system for intramuscular immunization
Authors: Wang, Xiaoyan and Zhang, Yu and Xue, Wei and Wang, Hong and Qiu, Xiaozhong and Liu, Zonghua
Journal: Journal of Biomaterials Applications (2017): 923--932

Cube-shaped theranostic paclitaxel prodrug nanocrystals with surface functionalization of SPC and MPEG-DSPE for imaging and chemotherapy
Authors: Guo, Fuqiang and Shang, Jiajia and Zhao, Hai and Lai, Kangrong and Li, Yang and Fan, Zhongxiong and Hou, Zhenqing and Su, Guanghao
Journal: Colloids and Surfaces B: Biointerfaces (2017)

Light/magnetic hyperthermia triggered drug released from multi-functional thermo-sensitive magnetoliposomes for precise cancer synergetic theranostics
Authors: Guo, Yuxin and Zhang, Yang and Ma, Jinyuan and Li, Qi and Li, Yang and Zhou, Xinyi and Zhao, Dan and Song, Hua and Chen, Qing and Zhu, Xuan
Journal: Journal of Controlled Release (2017)

References

View all 21 references: Citation Explorer

Excitation of Cy5 in self-assembled lipid bilayers using optical microresonators
Authors: Freeman LM, Li S, Dayani Y, Choi HS, Malmstadt N, Armani AM.
Journal: Appl Phys Lett (2011): 143703

Theranostic cRGD-BioShuttle Constructs Containing Temozolomide- and Cy7 For NIR-Imaging and Therapy
Authors: Wiessler M, Hennrich U, Pipkorn R, Waldeck W, Cao L, Peter J, Ehemann V, Semmler W, Lammers T, Braun K.
Journal: Theranostics (2011): 381

Rational approach to select small peptide molecular probes labeled with fluorescent cyanine dyes for in vivo optical imaging
Authors: Berezin MY, Guo K, Akers W, Livingston J, Solomon M, Lee H, Liang K, Agee A, Achilefu S.
Journal: Biochemistry (2011): 2691

In vivo detection of embryonic stem cell-derived cardiovascular progenitor cells using Cy3-labeled Gadofluorine M in murine myocardium
Authors: Adler ED, Bystrup A, Briley-Saebo KC, Mani V, Young W, Giovanonne S, Altman P, Kattman SJ, Frank JA, Weinmann HJ, Keller GM, Fayad ZA.
Journal: JACC Cardiovasc Imaging (2009): 1114

Quantitative proteomics by fluorescent labeling of cysteine residues using a set of two cyanine-based or three rhodamine-based dyes
Authors: Volke D, Hoffmann R.
Journal: Electrophoresis (2008): 4516

Page updated on December 17, 2024

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Catalog Number	140
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Physical properties

Molecular weight	744.80
Solvent	DMSO

Spectral properties

Correction Factor (260 nm)	0.07
Correction Factor (280 nm)	0.073
Extinction coefficient (cm ^-1 M ^-1)	150000¹
Excitation (nm)	555
Emission (nm)	569
Quantum yield	0.15¹

Storage, safety and handling

H-phrase	H303, H313, H333
Hazard symbol	XN
Intended use	Research Use Only (RUO)
R-phrase	R20, R21, R22
Storage	Freeze (< -15 °C); Minimize light exposure
UNSPSC	12171501
CAS	146368-13-0