5-Fluoroorotic Acid

Catalog number: R0812

Thermo Scientific™  Related applications: Protein Assays and Analysis

Error loading your content!

  Catalog number
Select a plan
Unit size
Price ({{currency}}) Your price ({{currency}}) Availability Qty
{{product.sku}} {{product.sku}}
also known as {{product.formattedSku}} 
{{subscriptionDetails.selectedRatePlan.billingPeriod}} {{subscriptionDetails.selectedRatePlan.billingPeriod}} {{product.availability.message}}
Pro add-ons

Your on-site stock

›› {{supplyCenter.scName}}({{scProduct.stockOnHand}} In stock)
›› {{supplyCenter.scName}}(Out of stock)
›› {{supplyCenter.scName}}
This item is not currently available on-site. Depending on your Supply Center settings you may be able to add the item to cart above else use the Order Non-Stocked Items' tab on the Supply Center home page.
Back to top


Thermo Scientific 5-Fluoroorotic Acid (5-fluorouracil-6-carboxylic acid monohydrate; 5-FOA) is used in yeast molecular genetics to detect expression of the URA3 gene, which encodes orotine-5'-monophosphate (OMP) dicarboxylase. Yeasts with an active URA3 gene (Ura+) convert 5-FOA to fluorodeoxyuridine, which is toxic to cells (see the scheme below). Yeast strains carrying a mutation in the URA3 gene grow in the presence of 5-FOA if the media is supplemented with uracil. 5-FOA is frequently used in experiments with Saccharomyces cerevisiae (URA3), Schizosaccharomyces pombe (URA4 and URA5), Candida albicans (URA3), and E. coli (pyrF).


• Detection of URA3 gene expression in yeast
• Construction of yeast 2-hybrid libraries
• Other areas of yeast genetics including gene replacement, analysis of transposable genetic elements, and identification of gene mutation

• Low solubility in water
• Solubility in dimethylsulfoxide is greater than 150 mg/mL
• Preparation of a 100 mg/mL solution in dimethylsulfoxide is recommended
For Research Use Only. Not for use in diagnostic procedures.


Chemical Name: 5-Fluoroorotic Acid
Form: Powder
Product Size: 5 g


Manuals & protocols

Recommended products