This product is now part of a food safety range that includes Thermo Scientific™ culture media, molecular solutions, and other products for your complete microbiological workflow. In US, Canada and Europe, order this product from Thermo Fisher Scientific microbiology. >> Order now

Proteinase K, FS, for food safety testing

Catalog number: 4480715

Applied Biosystems™

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


Proteinase K, FS from the fungus Engyodontium album is a non-specific serine protease that is useful for general digestion of proteins. Proteinase K, FS is supplied specifically for use in food and environmental testing workflows. It is typically used in conjunction with Lysis Buffer, FS (available separately) to lyse microbial organisms in order to prepare the microbial DNA for downstream analysis by real-time PCR.

Proteinase K, FS can be used as a part of both the Pathatrix® Auto Instrument and RapidFinder™ Direct Lysis workflows.

When used as a part of the Pathatrix® Auto Instrument workflow, one bottle of Proteinase K, FS is sufficient for 1250 reactions.

When used as a part of the RapidFinder™ Direct Lysis workflow, one bottle of Proteinase K, FS is sufficient for 100 reactions.

Proteinase K, FS is supplied in 50% glycerol at a concentration of 20 mg/ml.

Unit Definition: One unit liberates 1 µmol of Folin-positive amino acids, measured as tyrosine, at 37°C, pH 7.5, using denatured bovine hemoglobin as the substrate.
For Testing of Food and Environmental Samples Only.


Product Size: 1.25 mL

Contents & storage

Store at -20°C. Do not store in a frost-free freezer.


Manuals & protocols

Recommended products