Frequently asked questions

Our Scientific Applications Support team has assembled a list of frequently asked questions to help you find answers quickly. Filter using one or more categories to focus on specific topics, or use the search bar to perform a text search.

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Do you offer FITC labeled primers?

IDT offers a 6-FAM fluorophore modification instead of the traditional FITC fluorophore modification. FITC and FAM are both derivatives of fluorescein. FITC is fluorescein with an isothiocyanate reactive group added, while 6-FAM is 6-carboxyfluorescein. FITC and 6-FAM have identical spectral characteristics. In experiments, 6-FAM performs exactly like FITC. Read more about IDT fluorescein modifications and fluorescence applications.