iFluor® 488 TCO
Ordering information
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Additional ordering information
Telephone | 1-800-990-8053 |
Fax | 1-800-609-2943 |
sales@aatbio.com | |
International | See distributors |
Bulk request | Inquire |
Custom size | Inquire |
Shipping | Standard overnight for United States, inquire for international |
Physical properties
Molecular weight | 945.16 |
Solvent | DMSO |
Spectral properties
Correction Factor (260 nm) | 0.21 |
Correction Factor (280 nm) | 0.11 |
Extinction coefficient (cm -1 M -1) | 750001 |
Excitation (nm) | 491 |
Emission (nm) | 516 |
Quantum yield | 0.91 |
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 |
Overview | ![]() ![]() |
See also: iFluor® Dyes and Kits
Molecular weight 945.16 | Correction Factor (260 nm) 0.21 | Correction Factor (280 nm) 0.11 | Extinction coefficient (cm -1 M -1) 750001 | Excitation (nm) 491 | Emission (nm) 516 | Quantum yield 0.91 |
The tetrazine-trans-cyclooctene (TCO) ligation constitutes a non-toxic biomolecule labeling method of unparalleled speed. A tetrazine-functionalized molecule reacts with a TCO-functionalized molecule, forming a stable conjugate via a dihydropyrazine moiety. This has gained popularity due to its extremely fast kinetics. AAT Bioquest offers a group of tetrazine- and TCO-containing dyes for exploring various biological systems that can use this powerful click reaction. iFluor® 488-TCO can be readily used to label tetrazine-modified biological molecules for fluorescence imaging and other fluorescence-based biochemical analysis. The conjugates prepared with iFluor® 488 dyes are far superior to those of fluorescein derivatives such as FITC. iFluor® 488 conjugates are significantly brighter than fluorescein conjugates and are much more photostable. Additionally, the fluorescence of iFluor® 488 is not affected by pH (4-10). This pH insensitivity is a major improvement over fluorescein, which emits its maximum fluorescence only at pH above 9. iFluor® 488 has spectral properties similar to Alexa Fluor® 488. In some cases, it demonstrates brighter signals (Alexa Fluor® is the trademark of Invitrogen).
Calculators
Common stock solution preparation
Table 1. Volume of DMSO needed to reconstitute specific mass of iFluor® 488 TCO 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 | 105.802 µL | 529.011 µL | 1.058 mL | 5.29 mL | 10.58 mL |
5 mM | 21.16 µL | 105.802 µL | 211.604 µL | 1.058 mL | 2.116 mL |
10 mM | 10.58 µL | 52.901 µL | 105.802 µL | 529.011 µL | 1.058 mL |
Molarity calculator
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Spectrum
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Spectral properties
Correction Factor (260 nm) | 0.21 |
Correction Factor (280 nm) | 0.11 |
Extinction coefficient (cm -1 M -1) | 750001 |
Excitation (nm) | 491 |
Emission (nm) | 516 |
Quantum yield | 0.91 |
Product Family
Name | Excitation (nm) | Emission (nm) | Extinction coefficient (cm -1 M -1) | Quantum yield | Correction Factor (260 nm) | Correction Factor (280 nm) |
iFluor® 488 maleimide | 491 | 516 | 750001 | 0.91 | 0.21 | 0.11 |
iFluor® 488 amine | 491 | 516 | 750001 | 0.91 | 0.21 | 0.11 |
iFluor® 488 hydrazide | 491 | 516 | 750001 | 0.91 | 0.21 | 0.11 |
iFluor® 488 tyramide | 491 | 516 | 750001 | 0.91 | 0.21 | 0.11 |
iFluor® 488 azide | 491 | 516 | 750001 | 0.91 | 0.21 | 0.11 |
iFluor® 488 alkyne | 491 | 516 | 750001 | 0.91 | 0.21 | 0.11 |
iFluor® 488 Styramide *Superior Replacement for Alexa Fluor 488 tyramide and Opal 520* | 491 | 516 | 750001 | 0.91 | 0.21 | 0.11 |
iFluor® 555 TCO | 557 | 570 | 1000001 | 0.641 | 0.23 | 0.14 |
iFluor® 594 TCO | 588 | 604 | 1800001 | 0.531 | 0.05 | 0.04 |
Show More (3) |
Images

Figure 1. The tetrazine-trans-cyclooctene (TCO) ligation constitutes a non-toxic biomolecule labeling method of unparalleled speed. A tetrazine-functionalized molecule reacts with a TCO-functionalized molecule, forming a stable conjugate via a dihydropyrazine moiety. This has gained popularity due to its extremely fast kinetics. iFluor® 488-TCO can be readily used to label tetrazine-modified biological molecules for fluorescence imaging and other fluorescence-based biochemical analysis.
Citations
View all 1 citations: Citation Explorer
CD95/Fas protects triple negative breast cancer from anti-tumor activity of NK cells
Authors: Qadir, Abdul S and Gu{\'e}gan, Jean Philippe and Ginestier, Christophe and Chaibi, Assia and Bessede, Alban and Charafe-Jauffret, Emmanuelle and Macario, Manon and Lavou{\'e}, Vincent and de la Motte Rouge, Thibault and Law, Calvin and others,
Journal: Iscience (2021): 103348
Authors: Qadir, Abdul S and Gu{\'e}gan, Jean Philippe and Ginestier, Christophe and Chaibi, Assia and Bessede, Alban and Charafe-Jauffret, Emmanuelle and Macario, Manon and Lavou{\'e}, Vincent and de la Motte Rouge, Thibault and Law, Calvin and others,
Journal: Iscience (2021): 103348
References
View all 50 references: Citation Explorer
Fluorescent bioorthogonal labeling of class B GPCRs in live cells.
Authors: Gangam, Srikanth Kumar and Lin, Qing
Journal: Methods in enzymology (2020): 95-111
Authors: Gangam, Srikanth Kumar and Lin, Qing
Journal: Methods in enzymology (2020): 95-111
Bond-Breaking Bio-orthogonal Chemistry Efficiently Uncages Fluorescent and Therapeutic Compounds under Physiological Conditions.
Authors: Wu, Xunshen and Wu, Kui and Gaye, Fatima and Royzen, Maksim
Journal: Organic letters (2020): 6041-6044
Authors: Wu, Xunshen and Wu, Kui and Gaye, Fatima and Royzen, Maksim
Journal: Organic letters (2020): 6041-6044
Fluorescent Janus emulsions for biosensing of Listeria monocytogenes.
Authors: Li, Jie and Savagatrup, Suchol and Nelson, Zachary and Yoshinaga, Kosuke and Swager, Timothy M
Journal: Proceedings of the National Academy of Sciences of the United States of America (2020): 11923-11930
Authors: Li, Jie and Savagatrup, Suchol and Nelson, Zachary and Yoshinaga, Kosuke and Swager, Timothy M
Journal: Proceedings of the National Academy of Sciences of the United States of America (2020): 11923-11930
Transition-Metal-Mediated versus Tetrazine-Triggered Bioorthogonal Release Reactions: Direct Comparison and Combinations Thereof.
Authors: Mancuso, Francesca and Rahm, Michal and Dzijak, Rastislav and Mertlíková-Kaiserová, Helena and Vrabel, Milan
Journal: ChemPlusChem (2020): 1669-1675
Authors: Mancuso, Francesca and Rahm, Michal and Dzijak, Rastislav and Mertlíková-Kaiserová, Helena and Vrabel, Milan
Journal: ChemPlusChem (2020): 1669-1675
Conditionally Controlling Human TLR2 Activity via Trans-Cyclooctene Caged Ligands.
Authors: van de Graaff, Michel J and Oosenbrug, Timo and Marqvorsen, Mikkel H S and Nascimento, Clarissa R and de Geus, Mark A R and Manoury, Bénédicte and Ressing, Maaike E and van Kasteren, Sander I
Journal: Bioconjugate chemistry (2020): 1685-1692
Authors: van de Graaff, Michel J and Oosenbrug, Timo and Marqvorsen, Mikkel H S and Nascimento, Clarissa R and de Geus, Mark A R and Manoury, Bénédicte and Ressing, Maaike E and van Kasteren, Sander I
Journal: Bioconjugate chemistry (2020): 1685-1692
Click by Click Microporous Annealed Particle (MAP) Scaffolds.
Authors: Darling, Nicole J and Xi, Weixian and Sideris, Elias and Anderson, Alexa R and Pong, Cassie and Carmichael, S Thomas and Segura, Tatiana
Journal: Advanced healthcare materials (2020): e1901391
Authors: Darling, Nicole J and Xi, Weixian and Sideris, Elias and Anderson, Alexa R and Pong, Cassie and Carmichael, S Thomas and Segura, Tatiana
Journal: Advanced healthcare materials (2020): e1901391
Hydrogel Synthesis and Stabilization via Tetrazine Click-Induced Secondary Interactions.
Authors: Holt, Samantha E and Rakoski, Amanda and Jivan, Faraz and Pérez, Lisa M and Alge, Daniel L
Journal: Macromolecular rapid communications (2020): e2000287
Authors: Holt, Samantha E and Rakoski, Amanda and Jivan, Faraz and Pérez, Lisa M and Alge, Daniel L
Journal: Macromolecular rapid communications (2020): e2000287
Cellular Delivery of Bioorthogonal Pretargeting Therapeutics in PSMA-Positive Prostate Cancer.
Authors: Hapuarachchige, Sudath and Huang, Colin T and Donnelly, Madeline C and Bařinka, Cyril and Lupold, Shawn E and Pomper, Martin G and Artemov, Dmitri
Journal: Molecular pharmaceutics (2020): 98-108
Authors: Hapuarachchige, Sudath and Huang, Colin T and Donnelly, Madeline C and Bařinka, Cyril and Lupold, Shawn E and Pomper, Martin G and Artemov, Dmitri
Journal: Molecular pharmaceutics (2020): 98-108
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Authors: Ko, Jina and Oh, Juhyun and Ahmed, Maaz S and Carlson, Jonathan C T and Weissleder, Ralph
Journal: Angewandte Chemie (International ed. in English) (2020): 6839-6846
A General Strategy for Macrotheranostic Prodrug Activation: Synergy between the Acidic Tumor Microenvironment and Bioorthogonal Chemistry.
Authors: Dong, Yansong and Tu, Yalan and Wang, Kewei and Xu, Congfei and Yuan, Youyong and Wang, Jun
Journal: Angewandte Chemie (International ed. in English) (2020): 7168-7172
Authors: Dong, Yansong and Tu, Yalan and Wang, Kewei and Xu, Congfei and Yuan, Youyong and Wang, Jun
Journal: Angewandte Chemie (International ed. in English) (2020): 7168-7172
Application notes
A Meta-Analysis of Common Calcium Indicators
A New Protein Crosslinking Method for Labeling and Modifying Antibodies
A Novel Fluorescent Probe for Imaging and Detecting Hydroxyl Radical in Living Cells
A Novel NO Wash Probeniceid-Free Calcium Assay for Functional Analysis of GPCR and Calcium Channel Targets
Abbreviation of Common Chemical Compounds Related to Peptides
A New Protein Crosslinking Method for Labeling and Modifying Antibodies
A Novel Fluorescent Probe for Imaging and Detecting Hydroxyl Radical in Living Cells
A Novel NO Wash Probeniceid-Free Calcium Assay for Functional Analysis of GPCR and Calcium Channel Targets
Abbreviation of Common Chemical Compounds Related to Peptides
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