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Cy7 biotin conjugate

Chemical structure for Cy7 biotin conjugate.
Chemical structure for Cy7 biotin conjugate.
Ordering information
Price ()
Catalog Number3106
Unit Size
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Additional ordering information
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ShippingStandard overnight for United States, inquire for international
Physical properties
Spectral properties
Correction Factor (260 nm)0.05
Correction Factor (280 nm)0.036
Correction Factor (482 nm)0.0005
Correction Factor (565 nm)0.0193
Correction Factor (650 nm)0.165
Extinction coefficient (cm -1 M -1)250000
Excitation (nm)756
Emission (nm)779
Quantum yield0.3
Storage, safety and handling
H-phraseH303, H313, H333
Hazard symbolXN
Intended useResearch Use Only (RUO)
R-phraseR20, R21, R22
StorageFreeze (< -15 °C); Minimize light exposure
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Show More (61)


Correction Factor (260 nm)
Correction Factor (280 nm)
Correction Factor (482 nm)
Correction Factor (565 nm)
Correction Factor (650 nm)
Extinction coefficient (cm -1 M -1)
Excitation (nm)
Emission (nm)
Quantum yield
Cy7 biotin conjugate demonstrates excellent avidin binding and strong NIR fluorescence. It has avidin-binding properties similar to native biotin in terms of high affinity, fast association, and non-cooperative binding to avidin and streptavidin tetramers. Cy7 Biotin can be used for detecting and quantifying biotin binding sites of avidin, streptavidin or neutravidin. This reagent overcomes major shortcomings of commonly used Biotin-4-fluorescein, e.g., poor solubility in aqueous media and pH dependent absorbance and short wavelength emission. Cy7 Biotin is a water-soluble reagent and its near infrared fluorescence is pH independent from pH 4 to pH 10. A flexible PEG spacer between biotin moiety and fluorescent tag minimizes the steric hindrance involved in binding to avidin, streptavidin or neutravidin.


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Spectral properties

Correction Factor (260 nm)0.05
Correction Factor (280 nm)0.036
Correction Factor (482 nm)0.0005
Correction Factor (565 nm)0.0193
Correction Factor (650 nm)0.165
Extinction coefficient (cm -1 M -1)250000
Excitation (nm)756
Emission (nm)779
Quantum yield0.3

Product family

NameExcitation (nm)Emission (nm)Extinction coefficient (cm -1 M -1)Quantum yieldCorrection Factor (260 nm)Correction Factor (280 nm)
Cy7®-streptavidin conjugate7567792500000.30.050.036
Phalloidin-Biotin Conjugate------
Cy5 biotin conjugate65167025000010.271, 0.420.020.03
Biotin-cAMP conjugate------
HRP-Biotin Conjugate------
Cy3 biotin conjugate55556915000010.1510.070.073


View all 6 references: Citation Explorer
Drug-Initiated Synthesis of Heterotelechelic Polymer Prodrug Nanoparticles for in Vivo Imaging and Cancer Cell Targeting.
Authors: Vinciguerra, Daniele and Degrassi, Anna and Mancini, Laura and Mura, Simona and Mougin, Julie and Couvreur, Patrick and Nicolas, Julien
Journal: Biomacromolecules (2019): 2464-2476
Multistep Consolidated Phototherapy Mediated by a NIR-Activated Photosensitizer.
Authors: Xue, Yudong and Li, Jipeng and Yang, Guoliang and Liu, Zhiyong and Zhou, Huifang and Zhang, Weian
Journal: ACS applied materials & interfaces (2019): 33628-33636
Disulfide-based multifunctional conjugates for targeted theranostic drug delivery.
Authors: Lee, Min Hee and Sessler, Jonathan L and Kim, Jong Seung
Journal: Accounts of chemical research (2015): 2935-46
Site-Specific Covalent Labeling of RNA by Enzymatic Transglycosylation.
Authors: Alexander, Seth C and Busby, Kayla N and Cole, Christian M and Zhou, Cun Yu and Devaraj, Neal K
Journal: Journal of the American Chemical Society (2015): 12756-9
Allo-7: a new fluorescent tandem dye for use in flow cytometry.
Authors: Beavis, A J and Pennline, K J
Journal: Cytometry (1996): 390-5
Anomalous fluorescence enhancement of Cy3 and cy3.5 versus anomalous fluorescence loss of Cy5 and Cy7 upon covalent linking to IgG and noncovalent binding to avidin.
Authors: Gruber, H J and Hahn, C D and Kada, G and Riener, C K and Harms, G S and Ahrer, W and Dax, T G and Knaus, H G
Journal: Bioconjugate chemistry : 696-704