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Cy7®-streptavidin conjugate
Streptavidin conjugates are widely used together with a conjugate of biotin for specific detection of a variety of proteins, protein motifs, nucleic acids and other molecules since streptavidin has a very high binding affinity for biotin. This Cy7-streptavidin conjugate comprises streptavidin (as the biotin-binding protein) with Cy7 covalently attached (as the fluorescent label). Our Cy7-streptavidin conjugate was prepared using AAT Bioquest's proprietary labeling technology. It demonstrated much brighter signal compared to the similar Cy7-streptavidin conjugates from other commercial sources, thus can significantly increase assay sensitivities. It is commonly used as a second step reagent for indirect immunofluorescent staining, when used in conjunction with biotinylated primary antibodies. It is a valuable tool for biotin-streptavidin-based biological assays and tests using flow cytometry with a Cy7 filter set. A variety of the complementary biotinylated reagents are available from numerous commercial vendors.
Spectrum
Product family
| Name | Excitation (nm) | Emission (nm) | Extinction coefficient (cm -1 M -1) | Quantum yield | Correction Factor (260 nm) | Correction Factor (280 nm) |
| Cy7 biotin conjugate | 756 | 779 | 250000 | 0.3 | 0.05 | 0.036 |
| RPE-streptavidin conjugate | 565 | 574 | 1960000 | 0.82 | - | 0.175 |
| APC-streptavidin conjugate | 651 | 660 | 730000 | - | - | 0.195 |
| PerCP-streptavidin conjugate | 477 | 678 | 406000 | - | - | 0.22 |
| FITC-streptavidin conjugate | 491 | 516 | 73000 | 0.92 | - | 0.35 |
| Cy3®-streptavidin conjugate | 555 | 569 | 1500001 | 0.151 | 0.07 | 0.073 |
| Cy5®-streptavidin conjugate | 651 | 670 | 2500001 | 0.271, 0.42 | 0.02 | 0.03 |
| XFD350-streptavidin conjugate *XFD350 Same Structure to Alexa Fluor™ 350* | 343 | 441 | 19000 | - | 0.25 | 0.19 |
| XFD488-streptavidin conjugate *XFD488 Same Structure to Alexa Fluor™ 488* | 499 | 520 | 73000 | 0.921 | 0.3 | 0.11 |
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Citations
View all 3 citations: Citation Explorer
Persistent repression of tau in the brain using engineered zinc finger protein transcription factors
Authors: Wegmann, Susanne and DeVos, Sarah L and Zeitler, Bryan and Marlen, Kimberly and Bennett, Rachel E and Perez-Rando, Marta and MacKenzie, Danny and Yu, Qi and Commins, Caitlin and Bannon, Riley N and others,
Journal: Science advances (2021): eabe1611
Authors: Wegmann, Susanne and DeVos, Sarah L and Zeitler, Bryan and Marlen, Kimberly and Bennett, Rachel E and Perez-Rando, Marta and MacKenzie, Danny and Yu, Qi and Commins, Caitlin and Bannon, Riley N and others,
Journal: Science advances (2021): eabe1611
Persistent repression of tau in the brain using engineered zinc finger protein transcription factors
Authors: Wegmann, Susanne and DeVos, Sarah L and Zeitler, Bryan and Marlen, Kimberly and Bennett, Rachel E and Perez-Rando, Marta and MacKenzie, Danny and Yu, Qi and Commins, Caitlin and Bannon, Riley N and others,
Journal: Science Advances (2021): eabe1611
Authors: Wegmann, Susanne and DeVos, Sarah L and Zeitler, Bryan and Marlen, Kimberly and Bennett, Rachel E and Perez-Rando, Marta and MacKenzie, Danny and Yu, Qi and Commins, Caitlin and Bannon, Riley N and others,
Journal: Science Advances (2021): eabe1611
Overexpression of MACC1 and the association with hepatocyte growth factor/c-Met in epithelial ovarian cancer
Authors: Li, Hongyu and Zhang, Hui and Zhao, Shujun and Shi, Yun and Yao, Junge and Zhang, Yanyan and Guo, Huanhuan and Liu, Xingsuo
Journal: Oncology letters (2015): 1989--1996
Authors: Li, Hongyu and Zhang, Hui and Zhao, Shujun and Shi, Yun and Yao, Junge and Zhang, Yanyan and Guo, Huanhuan and Liu, Xingsuo
Journal: Oncology letters (2015): 1989--1996
References
View all 47 references: Citation Explorer
A streptavidin paramagnetic-particle based competition assay for the evaluation of the optical selectivity of quadruplex nucleic acid fluorescent probes
Authors: Largy E, Hamon F, Teulade-Fichou MP.
Journal: Methods. (2012)
Authors: Largy E, Hamon F, Teulade-Fichou MP.
Journal: Methods. (2012)
Biotin-4-fluorescein based fluorescence quenching assay for determination of biotin binding capacity of streptavidin conjugated quantum dots
Authors: Mittal R, Bruchez MP.
Journal: Bioconjug Chem (2011): 362
Authors: Mittal R, Bruchez MP.
Journal: Bioconjug Chem (2011): 362
Iminobiotin binding induces large fluorescent enhancements in avidin and streptavidin fluorescent conjugates and exhibits diverging pH-dependent binding affinities
Authors: Raphael MP, Rappole CA, Kurihara LK, Christodoulides JA, Qadri SN, Byers JM.
Journal: J Fluoresc (2011): 647
Authors: Raphael MP, Rappole CA, Kurihara LK, Christodoulides JA, Qadri SN, Byers JM.
Journal: J Fluoresc (2011): 647
Streptavidin-Binding Peptide (SBP)-tagged SMC2 allows single-step affinity fluorescence, blotting or purification of the condensin complex
Authors: Kim JH, Chang TM, Graham AN, Choo KH, Kalitsis P, Hudson DF.
Journal: BMC Biochem (2010): 50
Authors: Kim JH, Chang TM, Graham AN, Choo KH, Kalitsis P, Hudson DF.
Journal: BMC Biochem (2010): 50
Determination of 17beta-oestradiol by fluorescence immunoassay with streptavidin-conjugated quantum dots as label
Authors: Sun M, Du L, Gao S, Bao Y, Wang S.
Journal: Steroids (2010): 400
Authors: Sun M, Du L, Gao S, Bao Y, Wang S.
Journal: Steroids (2010): 400
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