ALEXA FLUOR 633 FREE ACID 5 mg，A33083，Invitrogen

Alexa Fluor® 633 Carboxylic Acid is a non-reactive form of Alexa Fluor® 633 that can be used as a reference standard for dye-conjugates. Additionally, this carboxylic acid derivative can be converted to an amine-reactive ester using standard chemical techniques or coupled to hydrazines, hydroxylamines, and amines in aqueous solution using water-soluble carbodiimides such as EDAC (Cat. No. E2247).

Characteristics of Alexa Fluor® 633 dye include:

• Laser line: 633 or 635 nm
• Excitation maxima: 632 nm
• Emission maxima: 647 nm

More About Alexa Fluor® 633 Dye
The Alexa Fluor 633 dye and its conjugates are a perfect match to the 633 nm spectra line of the He-Ne laser or the 635 nm spectral line of red diode lasers. This and other far-red fluorescent Alexa Fluor® dyes are important labels for fluorescence imaging because their spectra are beyond the range of most sample autofluorescence.

Discover the Benefits of the Alexa Fluor® Dye Series
Compared to traditional dyes, Alexa Fluor® dyes are brighter, more photostable, and more pH-resistant between pH 4 and 10. And generally when using Alexa Fluor® dyes, higher degrees of labeling can be achieved without intramolecular quenching. For details see Alexa Fluor® Dyes Spanning the Visible and Infrared Spectrum in the Molecular Probes Handbook.