iFluor® 488 amine

Although FITC is still the most popular fluorescent labeling dye for preparing green fluorescent bioconjugates, there are certain limitations with FITC, such as severe photobleaching for microscope imaging and pH-sensitive fluorescence. Protein conjugates prepared with iFluor® 488 dyes are far superior to conjugates 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 amine is stable and used for modifying carbonyl groups (e.g., aldehyde and carboxy groups).

Calculators

Common stock solution preparation

Table 1. Volume of DMSO needed to reconstitute specific mass of iFluor® 488 amine 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	124.13 µL	620.648 µL	1.241 mL	6.206 mL	12.413 mL
5 mM	24.826 µL	124.13 µL	248.259 µL	1.241 mL	2.483 mL
10 mM	12.413 µL	62.065 µL	124.13 µL	620.648 µL	1.241 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)
iFluor® 350 amine	345	450	20000¹	0.95¹	0.83	0.23
iFluor® 405 amine	403	427	37000¹	0.91¹	0.48	0.77
iFluor® 555 amine	557	570	100000¹	0.64¹	0.23	0.14
iFluor® 647 amine	656	670	250000¹	0.25¹	0.03	0.03
iFluor® 660 amine	663	678	250000¹	0.26¹	0.07	0.08
iFluor® 680 amine	684	701	220000¹	0.23¹	0.097	0.094
iFluor® 700 amine	690	713	220000¹	0.23¹	0.09	0.04
iFluor® 710 amine	716	739	150000¹	0.60¹	0.12	0.07
iFluor® 750 amine	757	779	275000¹	0.12¹	0.044	0.039
iFluor® 790 amine	787	812	250000¹	0.13¹	0.1	0.09
iFluor® 488 tyramide	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® 488 TCO	491	516	75000¹	0.9¹	0.21	0.11
iFluor® 488 Tetrazine	491	516	75000¹	0.9¹	0.21	0.11
iFluor®488-dUTP 1 mM in TE Buffer (pH 7.5)	491	516	75000¹	0.9¹	0.21	0.11
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Citations

View all 20 citations: Citation Explorer

IKIP downregulates THBS1/FAK signaling to suppress migration and invasion by glioblastoma cells
Authors: Zhu, Zhaoying and Hu, Yanjia and Ye, Feng and Teng, Haibo and You, Guoliang and Zeng, Yunhui and Tian, Meng and Xu, Jianguo and Li, Jin and Liu, Zhiyong and others,
Journal: Oncology Research (2024): 1173

Pharmacological inhibition of RAS overcomes FLT3 inhibitor resistance in FLT3-ITD+ AML through AP-1 and RUNX1
Authors: Coleman, Daniel JL and Keane, Peter and Chin, Paulynn S and Ames, Luke and Kellaway, Sophie and Blair, Helen and Khan, Naeem and Griffin, James and Holmes, Elizabeth and Maytum, Alexander and others,
Journal: iScience (2024)

A high-throughput DNA analysis method based on isothermal amplification on a suspension microarray for detecting mpox virus and viruses with comparable symptoms
Authors: Zhang, Liming and Liu, Jieyu and Huang, Shisi and Zeng, Wentao and Li, Li and Fan, Xihao and Lu, Zhuoxuan
Journal: Analytica Chimica Acta (2024): 342416

FAM81A is a postsynaptic protein that regulates the condensation of postsynaptic proteins via liquid--liquid phase separation
Authors: Kaizuka, Takeshi and Hirouchi, Taisei and Saneyoshi, Takeo and Shirafuji, Toshihiko and Collins, Mark O and Grant, Seth GN and Hayashi, Yasunori and Takumi, Toru
Journal: Plos Biology (2024): e3002006

Phosphorylation-dependent membraneless organelle fusion and fission illustrated by postsynaptic density assemblies
Authors: Wu, Haowei and Chen, Xudong and Shen, Zeyu and Li, Hao and Liang, Shiqi and Lu, Youming and Zhang, Mingjie
Journal: Molecular Cell (2023)

References

View all 49 references: Citation Explorer

Sequential ordering among multicolor fluorophores for protein labeling facility via aggregation-elimination based beta-lactam probes
Authors: Sadhu KK, Mizukami S, Watanabe S, Kikuchi K.
Journal: Mol Biosyst (2011): 1766

Visualizing dengue virus through Alexa Fluor labeling
Authors: Zhang S, Tan HC, Ooi EE.
Journal: J Vis Exp. (2011)

Fluorescent "Turn-on" system utilizing a quencher-conjugated peptide for specific protein labeling of living cells
Authors: Arai S, Yoon SI, Murata A, Takabayashi M, Wu X, Lu Y, Takeoka S, Ozaki M.
Journal: Biochem Biophys Res Commun (2011): 211

Neuroanatomical basis of clinical joint application of "Jinggu" (BL 64, a source-acupoint) and "Dazhong" (KI 4, a Luo-acupoint) in the rat: a double-labeling study of cholera toxin subunit B conjugated with Alexa Fluor 488 and 594
Authors: Cui JJ, Zhu XL, Ji CF, Jing XH, Bai WZ.
Journal: Zhen Ci Yan Jiu (2011): 262

Simultaneous detection of virulence factors from a colony in diarrheagenic Escherichia coli by a multiplex PCR assay with Alexa Fluor-labeled primers
Authors: Kuwayama M, Shigemoto N, Oohara S, Tanizawa Y, Yamada H, Takeda Y, Matsuo T, Fukuda S.
Journal: J Microbiol Methods (2011): 119

Page updated on October 28, 2024

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Catalog Number	1072
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Physical properties

Molecular weight	805.61
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