Illuminating research for decades

Invitrogen Alexa Fluor dyes—the leading and most trusted fluorescent dyes available today.  In addition to superior performance you’ll get an experienced, problem-solving technical support team, >50,000 published references, application and experimental tips, as well as protocols to help with experimental planning. For the best research experience, you’ll want to use Alexa Fluor dyes.

See all Alexa Fluor Primary Antibodies
See all Alexa Fluor Secondary Antibodies
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Highest-performing dyes available


Alexa Fluor  conjugates exhibit more intense fluorescence than other spectrally similar conjugates. Learn more about:

Alexa Fluor dyes brightness
Alexa Fluor dyes photostability

Using too much secondary antibody?


Alexa Fluor dyes superior performance means you need less conjugate for optimal results.

See a comparison of working concentration of selected secondary conjugates

Alexa Fluor dyes across the spectrum


Alexa Fluor dyes and conjugates are available across the visible spectrum and beyond.

Learn more about our wide range of Alexa Fluor dyes

For Research Use Only. Not for use in diagnostic procedures.