Maleimide Biotin

Fluorescein-5-Maleimide

Category: Products & Services > Labeling & Detection Products > Labels & Labeling Kits > Thiol-Reactive Fluorophores, Biotins & Other Labels

Searching for superior alternatives to fluorescein? Our Alexa Fluor Dye Series offers everything you're looking for and more.

Catalog: F-150
Size: 25 mg

Alexa Fluor® 647 C 2 Maleimide

Category: Products & Services > Labeling & Detection Products > Labels & Labeling Kits > Thiol-Reactive Fluorophores, Biotins & Other Labels

Conjugates prepared with the thiol-reactive Alexa Fluor 647® C 2 maleimide are spectrally similar to the Cy5 dye, resulting in an optimal match to optical filters for the Cy5 dye. Total fluorescence of secondary antibody conjugates of Alexa Fluor® 647 dye, however, is significantly higher than that of Cy5 conjugates. Unlike the Cy5 dye, Alexa Fluor® 647 dye has very little change in absorption of fluorescence spectra when conjugated to most porteins, oligonucleotides, or nucleic acids, yielding greater total fluorescence at the same degree of substitution.

Catalog: A-20347
Size: 1 mg

Alexa Fluor® 546 C 5 Maleimide

Category: Products & Services > Labeling & Detection Products > Labels & Labeling Kits > Thiol-Reactive Fluorophores, Biotins & Other Labels

The thiol-reactive Alexa Fluor 546 C 5 maleimide and its conjugates are perfect for applications that require orange-fluorescent probes. Spectrally similar to the Cy3 dye, the Alexa Fluor 546 dye is readily excited by the 546 nm line of the mercury-arc lamp and the 543 nm line of the He-Ne laser.

Catalog: A-10258
Size: 1 mg

Alexa Fluor® 488 C 5 Maleimide

Category: Products & Services > Labeling & Detection Products > Labels & Labeling Kits > Thiol-Reactive Fluorophores, Biotins & Other Labels

Conjugates prepared with the thiol-reactive Alexa Fluor 488 C 5 maleimide are significantly brighter and more photostable than fluorescein. The bright, green fluorescence of the Alexa Fluor 488 dye, which is spectrally similar to that of fluorescein, is pH independent from pH 4 to 10.

Catalog: A-10254
Size: 1 mg