AF 488 NHS ester

AF 488 NHS esters Protein labeling

Cat. #	Quantity	Price	Lead time
11820	1 mg	$125	in stock
21820	5 mg	$325	in stock
31820	10 mg	$480	in stock
41820	25 mg	$950	in stock
51820	50 mg	$1625	in stock
61820	100 mg	$2090	in stock

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AF 488 is a bright and photostable dye. Due to its high hydrophilicity, this is a dye of choice for the labeling of sensitive proteins and antibodies. The dye is useful for many demanding applications, including microscopy.

AF 488 is a sulfonated rhodamine dye Rhodamine 110 (R110). Like other rhodamines, it is available as 5- and 6-isomers, which have almost identical photophysical properties. The isomers need to be separated, otherwise, the use of mixed isomer dye can lead to doubled peaks during HPLC or electrophoresis separations of the labeled products. This product is an isomerically pure 5-AF 488.

This NHS ester is an amine-reactive dye; it can label amine groups in proteins, peptides, amino-modified oligos, and other target molecules.

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Absorption and emission spectra of AF 488

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General properties

Appearance:	dark orange solid
Molecular weight:	732.74
Molecular formula:	C₃₁H₃₂N₄O₁₃S₂
Solubility:	good in water, DMF, DMSO
Quality control:	NMR ¹H, HPLC-MS (80+%, balance mostly carboxylic acid)
Storage conditions:	Storage: 12 months after receipt at -20°C in the dark. Transportation: at room temperature for up to 3 weeks. Avoid prolonged exposure to light. Desiccate.
MSDS:	Download
	Product specifications

Spectral properties

Excitation/absorption maximum, nm:	495
ε, L⋅mol⁻¹⋅cm⁻¹:	71800
Emission maximum, nm:	519
Fluorescence quantum yield:	0.91
CF₂₆₀:	0.16
CF₂₈₀:	0.10

Product citations

Schöpf, F.; Marongiu, G.L.; Milaj, K.; Sprink, T.; Kikhney, J.; Moter, A.; Roderer, D. Structural basis of Fusobacterium nucleatumadhesin Fap2 interaction with receptors on cancer and immune cells. bioRxiv, 2024, preprint. doi: 10.1101/2024.02.28.582045
Białobrzewski, M.K.; Klepka, B.P.; Michaś, A.; Cieplak-Rotowska, M.K.; Staszałek, Z.; Niedźwiecka, A. Diversity of hydrodynamic radii of intrinsically disordered proteins. European Biophysics Journal, 2023, 52, 607-618. doi: 10.1007/s00249-023-01683-8
Makri Pistikou, A.-M.; Cremers, G.A.O.; Nathalia, B.L.; Meuleman, T.J.; Bögels, B.W.A.; Eijkens, B.V.; de Dreu, A.; Bezembinder, M.T.H.; Stassen, O.M.J.A.; Bouten, C.C.V.; Merkx, M.; Jerala, R.; de Greef, T.F.A. Engineering a scalable and orthogonal platform for synthetic communication in mammalian cells. Nature Communications, 2023, 14, 7001. doi: 10.1038/s41467-023-42810-5
Wiest, M.J.; Baert, L.; Gu, C.; Gayler, K.M.; Ham, H.; Gorvel, L.; Keddis, M.T.; Griffing, L.W.; Joo, H.M.; Gorvel, J.-P.; Billadeau, D.D.; Kane, R.R.; Oh, S.K. Endosomal trafficking inhibitor EGA can control TLR7-mediated IFNα expression by human plasmacytoid dendritic cells. Frontiers in Immunology, 2023, 14, 1202197. doi: 10.3389/fimmu.2023.1202197

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This Product is offered and sold for research purposes only. It has not been tested for safety and efficacy in food, drug, medical device, cosmetic, commercial or any other use. Supply does not express or imply authorization to use for any other purpose, including, without limitation, in vitro diagnostic purposes, in the manufacture of food or pharmaceutical products, in medical devices or in cosmetic products.