iFluor® 597 succinimidyl ester

Name: iFluor® 597 succinimidyl ester
Brand: AAT Bioquest
SKU: 1050
Price: 322 USD
Availability: InStock

AAT Bioquest's iFluor® dyes are optimized for labeling proteins, particularly antibodies. These dyes are bright, photostable, and have minimal quenching on proteins. They can be well excited by the major laser lines of fluorescence instruments (e.g., 350, 405, 488, 555, 633, 638, 647, 660, and 802 nm). iFluor® 597 is a unique color for fluorescence imaging and flow cytometry applications. iFluor® 597 is an excellent acceptor dye for preparing PE-tandem dyes. These iFluor® 597 tandem colors offer a set of unique color profiles for spectral flow cytometry. Compared to Alexa Fluor® 594 tandems, iFluor® 597 tandems have improved FRET efficiency and photostability.

Example protocol

PREPARATION OF STOCK SOLUTIONS

Unless otherwise noted, all unused stock solutions should be divided into single-use aliquots and stored at -20 °C after preparation. Avoid repeated freeze-thaw cycles.

1. Protein stock solution (Solution A)

Mix 100 µL of a reaction buffer (e.g., 1 M sodium carbonate solution or 1 M phosphate buffer with pH ~9.0) with 900 µL of the target protein solution (e.g. antibody, protein concentration >2 mg/mL if possible) to give 1 mL protein labeling stock solution.
Note: The pH of the protein solution (Solution A) should be 8.5 ± 0.5. If the pH of the protein solution is lower than 8.0, adjust the pH to the range of 8.0-9.0 using 1 M sodium bicarbonate solution or 1 M pH 9.0 phosphate buffer.
Note: The protein should be dissolved in 1X phosphate buffered saline (PBS), pH 7.2-7.4. If the protein is dissolved in Tris or glycine buffer, it must be dialyzed against 1X PBS, pH 7.2-7.4, to remove free amines or ammonium salts (such as ammonium sulfate and ammonium acetate) that are widely used for protein precipitation.
Note: Impure antibodies or antibodies stabilized with bovine serum albumin (BSA) or gelatin will not be labeled well. The presence of sodium azide or thimerosal might also interfere with the conjugation reaction. Sodium azide or thimerosal can be removed by dialysis or spin column for optimal labeling results.
Note: The conjugation efficiency is significantly reduced if the protein concentration is less than 2 mg/mL. For optimal labeling efficiency the final protein concentration range of 2-10 mg/mL is recommended.

2. iFluor™ 597 SE stock solution (Solution B)

Add anhydrous DMSO into the vial of iFluor™ 597 SE to make a 10 mM stock solution. Mix well by pipetting or vortex.
Note: Prepare the dye stock solution (Solution B) before starting the conjugation. Use promptly. Extended storage of the dye stock solution may reduce the dye activity. Solution B can be stored in freezer for two weeks when kept from light and moisture. Avoid freeze-thaw cycles.

SAMPLE EXPERIMENTAL PROTOCOL

This labeling protocol was developed for the conjugate of Goat anti-mouse IgG with iFluor™ 597 SE. You might need further optimization for your particular proteins. Each protein requires distinct dye/protein ratio, which also depends on the properties of dyes. Over labeling of a protein could detrimentally affects its binding affinity while the protein conjugates of low dye/protein ratio gives reduced sensitivity.

Run conjugation reaction

Use 10:1 molar ratio of Solution B (dye)/Solution A (protein) as the starting point: Add 5 µL of the dye stock solution (Solution B, assuming the dye stock solution is 10 mM) into the vial of the protein solution (95 µL of Solution A) with effective shaking. The concentration of the protein is ~0.05 mM assuming the protein concentration is 10 mg/mL and the molecular weight of the protein is ~200KD. Note: We recommend to use 10:1 molar ratio of Solution B (dye)/Solution A (protein). If it is too less or too high, determine the optimal dye/protein ratio at 5:1, 15:1 and 20:1 respectively.
Continue to rotate or shake the reaction mixture at room temperature for 30-60 minutes.

Purify the conjugation

The following protocol is an example of dye-protein conjugate purification by using a Sephadex G-25 column.

Prepare Sephadex G-25 column according to the manufacture instruction.
Load the reaction mixture (From "Run conjugation reaction") to the top of the Sephadex G-25 column.
Add PBS (pH 7.2-7.4) as soon as the sample runs just below the top resin surface.
Add more PBS (pH 7.2-7.4) to the desired sample to complete the column purification. Combine the fractions that contain the desired dye-protein conjugate. Note: For immediate use, the dye-protein conjugate need be diluted with staining buffer, and aliquoted for multiple uses. Note: For longer term storage, dye-protein conjugate solution need be concentrated or freeze dried.

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 succinimidyl ester	345	450	20000¹	0.95¹	0.83	0.23
iFluor® 405 succinimidyl ester	403	427	37000¹	0.91¹	0.48	0.77
iFluor® 430 succinimidyl ester	433	498	40000¹	0.78¹	0.68	0.3
iFluor® 440 succinimidyl ester	434	480	40000¹	0.67¹	0.352	0.229
iFluor® 445 succinimidyl ester	446	558	-	-	-	-
iFluor® 450 succinimidyl ester	451	502	40000¹	0.82¹	0.45	0.27
iFluor® 460 succinimidyl ester	468	493	80000¹	~0.8¹	0.98	0.46
iFluor® 488 succinimidyl ester	491	516	75000¹	0.9¹	0.21	0.11
iFluor® 500 succinimidyl ester	501	520	80000¹	-	0.206	0.088
iFluor® 510 succinimidyl ester	511	530	-	-	-	-
iFluor® 514 succinimidyl ester	511	527	75000¹	0.83¹	0.265	0.116
iFluor® 532 succinimidyl ester	537	560	90000¹	0.68¹	0.26	0.16
iFluor® 540 succinimidyl ester	540	557	-	-	-	0.105
iFluor® 546 succinimidyl ester	541	557	100000¹	0.67¹	0.25	0.15
iFluor® 555 succinimidyl ester	557	570	100000¹	0.64¹	0.23	0.14
iFluor® 560 succinimidyl ester	560	571	120000¹	0.57¹	0.0482	0.069
iFluor® 568 succinimidyl ester	568	587	100000¹	0.57¹	0.34	0.15
iFluor® 570 succinimidyl ester	557	570	120000¹	0.58¹	-	-
iFluor® 594 succinimidyl ester	587	603	200000¹	0.53¹	0.05	0.04
iFluor® 605 succinimidyl ester	603	623	-	-	-	-
iFluor® 610 succinimidyl ester	610	628	110000¹	0.85¹	0.32	0.49
iFluor® 620 succinimidyl ester	621	636	-	-	-	0.04
iFluor® 625 succinimidyl ester	624	640	-	-	-	-
iFluor® 633 succinimidyl ester	640	654	250000¹	0.29¹	0.062	0.044
iFluor® 647 succinimidyl ester	656	670	250000¹	0.25¹	0.03	0.03
iFluor® 660 succinimidyl ester	663	678	250000¹	0.26¹	0.07	0.08
iFluor® 665 succinimidyl ester	667	692	110,000¹	0.22¹	0.12	0.09
iFluor® 670 succinimidyl ester	671	682	200000¹	0.55¹	0.03	0.033
iFluor® 675 succinimidyl ester	683	700	-	-	-	0.066
iFluor® 680 succinimidyl ester	684	701	220000¹	0.23¹	0.097	0.094
iFluor® 690 succinimidyl ester	685	704	220000¹	0.30¹	0.09	0.06
iFluor® 700 succinimidyl ester	690	713	220000¹	0.23¹	0.09	0.04
iFluor® 710 succinimidyl ester	716	739	150000¹	0.60¹	0.12	0.07
iFluor® 720 succinimidyl ester	716	740	240000¹	0.14¹	0.15	0.13
iFluor® 740 succinimidyl ester	740	764	225000¹	0.20¹	0.16	0.16
iFluor® 750 succinimidyl ester	757	779	275000¹	0.12¹	0.044	0.039
iFluor® 770 succinimidyl ester	777	797	250000¹	0.16	0.09	0.08
iFluor® 780 succinimidyl ester	784	808	250000¹	0.16¹	0.13	0.12
iFluor® 790 succinimidyl ester	787	812	250000¹	0.13¹	0.1	0.09
iFluor® 800 succinimidyl ester	801	820	250000¹	0.11¹	0.03	0.08
iFluor® 810 succinimidyl ester	811	822	250000¹	0.05¹	0.09	0.15
iFluor® 820 succinimidyl ester	822	850	250000¹		0.11	0.16
iFluor® 830 succinimidyl ester	830	867	-	-	-	-
iFluor® 840 succinimidyl ester	836	879	200000¹	-	0.2	0.09
iFluor® 860 succinimidyl ester	853	878	250000¹		0.1	0.14
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Citations

View all 3 citations: Citation Explorer

B-067 Human IgE Monoclonal Antibodies as Unique Tools for Allergy Diagnostics
Authors: Filep, S and Reid Black, K and Smith, B and Bermingham, M and Pomes, A and Chapman, M
Journal: Clinical Chemistry (2024): hvae106--429

B-065 Comparative Analysis of 14-3-3$\eta$ Autoantibody Assays on Luminex Platform for Diagnosing Axial Spondyloarthritis
Authors: Sidhu, N and Maksymowych, WP and Wichuk, S and Marotta, A
Journal: Clinical Chemistry (2024): hvae106--427

B-066 VeraBIND™ Borrelia Antibody Test: Multiplex Capture, Enrichment, and Detection of Borrelia Burgdorferi Antigens-Specific Immunoglobulins From Saline Oral Rinse Samples
Authors: Shamsundar, K and Ansari, KI and Bergmann, S and Kleven, K and Soldo, J
Journal: Clinical Chemistry (2024): hvae106--428

References

View all 50 references: Citation Explorer

Comparison of Sensory and Motor Innervation Between the Acupoints LR3 and LR8 in the Rat With Regional Anatomy and Neural Tract Tracing.
Authors: Xu, Dongsheng and Zou, Ling and Zhang, Wenjie and Liao, Jieying and Wang, Jia and Cui, Jingjing and Su, Yuxin and Wang, Yuqing and Guo, Yating and Shen, Yi and Bai, Wanzhu
Journal: Frontiers in integrative neuroscience (2021): 728747

KFP-1, a Novel Calcium-Binding Peptide Isolated from Kefir, Promotes Calcium Influx Through TRPV6 Channels.
Authors: Chang, Gary Ro-Lin and Tu, Min-Yu and Chen, Yu-Hsuan and Chang, Ku-Yi and Chen, Chien-Fu and Lai, Jen-Chieh and Tung, Yu-Tang and Chen, Hsiao-Ling and Fan, Hueng-Chuen and Chen, Chuan-Mu
Journal: Molecular nutrition & food research (2021): e2100182

MicroRNA-126 inhibits pathological retinal neovascularization via suppressing vascular endothelial growth factor expression in a rat model of retinopathy of prematurity.
Authors: Fan, Yuan-Yao and Liu, Chi-Hsien and Wu, An-Lun and Chen, Hung-Chi and Hsueh, Yi-Jen and Chen, Kuan-Jen and Lai, Chi-Chun and Huang, Chung-Ying and Wu, Wei-Chi
Journal: European journal of pharmacology (2021): 174035

Retinal ganglion cells projecting to superior colliculus and pulvinar in marmoset.
Authors: Grünert, Ulrike and Lee, Sammy C S and Kwan, William C and Mundinano, Inaki-Carril and Bourne, James A and Martin, Paul R
Journal: Brain structure & function (2021)

A fully integrated isotachophoresis with a programmable microfluidic platform.
Authors: Shebindu, Adam and Somaweera, Himali and Estlack, Zachary and Kim, Jungtae and Kim, Jungkyu
Journal: Talanta (2021): 122039

Page updated on May 19, 2025

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Catalog Number	1050
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Physical properties

Molecular weight	1058.29
Solvent	DMSO

Spectral properties

Absorbance (nm)	597
Correction Factor (260 nm)	0.335
Correction Factor (280 nm)	0.514
Extinction coefficient (cm ^-1 M ^-1)	100000¹
Excitation (nm)	598
Emission (nm)	618
Quantum yield	0.7¹

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