Name: 5-TAMRA Maleimide [Tetramethylrhodamine-5-maleimide] *CAS 154480-30-5*
Brand: AAT Bioquest
SKU: 421
Price: 232 USD
Availability: InStock

5-TAMRA Maleimide

Tetramethylrhodamine-5-maleimide; CAS 154480-30-5

Tetramethylrhodamine-5-maleimide is the purified single isomer of tetramethylrhodamine-5 (and 6)-maleimide mixed isomers. It is widely used for thiol modifications of peptides and proteins. It is preferred for some complicated biological applications where reproducibility is more critical than material cost since the minor positional difference between the 5-isomer and 6-isomer might significantly affect some biological properties of the underlying conjugates. The 5-isomer is predominantly used to label peptides and proteins.

Protocol

SDS

COA

Catalog	Size	Price	Quantity
421	1 mg	Price

Calculators

Common stock solution preparation

Table 1. Volume of DMSO needed to reconstitute specific mass of 5-TAMRA Maleimide [Tetramethylrhodamine-5-maleimide] *CAS 154480-30-5* 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	207.68 µL	1.038 mL	2.077 mL	10.384 mL	20.768 mL
5 mM	41.536 µL	207.68 µL	415.36 µL	2.077 mL	4.154 mL
10 mM	20.768 µL	103.84 µL	207.68 µL	1.038 mL	2.077 mL

Molarity calculator

Enter any two values (mass, volume, concentration) to calculate the third.

Mass (Calculate)		Molecular weight		Volume (Calculate)		Concentration (Calculate)		Moles
mg	÷	481.51 g/mol	=	mL	x	mM	=	mmol

References

View all 21 references: Citation Explorer

Severing of F-actin by yeast cofilin is pH-independent

Authors:

Pavlov D, Muhlrad A, Cooper J, Wear M, Reisler E.

Journal:

Cell Motil Cytoskeleton (2006): 533

Fluorometric measurements of intermolecular distances between the alpha and beta subunits of the Na+/K+-ATPase

Authors:

Dempski RE, Hartung K, Friedrich T, Bamberg E.

Journal:

J Biol Chem. (2006)

4-aminopyridine prevents the conformational changes associated with P/C-type inactivation in Shaker channels

Authors:

Claydon TW, Vaid M, Rezazadeh S, Kehl SJ, Fedida D.

Journal:

J Pharmacol Exp Ther. (2006)

Both rotor and stator subunits are necessary for efficient binding of F1 to F0 in functionally assembled Escherichia coli ATP synthase

Authors:

Krebstakies T, Zimmermann B, Graber P, Altendorf K, Borsch M, Greie JC.

Journal:

J Biol Chem (2005): 33338

The beta subunit of the Na+/K+-ATPase follows the conformational state of the holoenzyme

Authors:

Dempski RE, Friedrich T, Bamberg E.

Journal:

J Gen Physiol (2005): 505

Physical properties

Molecular weight	481.51
Solvent	DMSO

Spectral properties

Correction factor (260 nm)	0.32
Correction factor (280 nm)	0.178
Extinction coefficient (cm ^-1 M ^-1)	90000
Excitation (nm)	552
Emission (nm)	578

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
CAS	154480-30-5

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Page updated on October 13, 2025