Thermo Scientific™

AarI (2 U/µL)

Catalog number:  ER1581

 Related applications: Restriction Enzyme Cloning

Error loading your content!

  Catalog number
Select a plan
Unit size
Price ({{currency}}) Availability Qty
{{product.sku}} {{product.sku}} also known as {{product.formattedSku}} 
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


5'  C  A  C  C  T  G  C  N4 3'
3'  G  T  G  G  A  C  G  N8 5'

Thermo Scientific AarI restriction enzyme recognizes CACCTGC(4/8)^ sites and cuts best at 37°C in its own unique (+oligo) buffer. See Reaction Conditions for Restriction Enzymes for a table of enzyme activity, conditions for double digestion, and heat inactivation for this and other restriction enzymes.

Thermo Scientific conventional restriction endonucleases are a large collection of high quality restriction enzymes, optimized to work in one of the buffers of the Five Buffer System. In addition, the universal Tango buffer is provided for convenience in double digestions. All of the enzymes exhibit 100% activity in the recommended buffer and reaction conditions. To ensure consistent performance, Thermo Scientific restriction enzyme reaction buffers contain premixed BSA, which enhances the stability of many enzymes and binds contaminants that may be present in DNA preparations.


• Superior quality—stringent quality control and industry leading manufacturing process
• Convenient color-coded Five Buffer System
• Includes universal Tango buffer for double-digestions
• BSA premixed in reaction buffers
• Wide selection of restriction endonuclease specificities


• Molecular cloning
• Restriction site mapping
• Genotyping
• Southern blotting
• Restriction fragment length polymorphism (RFLP)

Note: For methylation sensitivity, refer to product specifications. For cleavage with AarI at least two copies of its recognition sequence are required. Inclusion of 0.5 µM oligonucleotide with the AarI recognition sequence in the reaction mixture significantly improves cleavage of DNAs, especially of those with a single AarI site. Still, a complete cleavage of some substrates with AarI is difficult to achieve. Greater than 10-fold overdigestion with AarI may result in star activity. AarI may remain associated with the cleaved DNA. This may cause DNA band shifting during electrophoresis. To avoid atypical DNA band patterns, use the 6X DNA Loading Dye & SDS Solution for sample preparation or heat the digested DNA in the presence of SDS prior to electrophoresis.
For Research Use Only. Not for use in diagnostic procedures.


Compatible Buffer: Unique Buffer (10x Buffer AarI)
Enzyme: AarI
Methylation Sensitivity: CpG methylation-sensitive, Not dam methylation-sensitive, Not dcm methylation-sensitive
Optimal Reaction Temperature: 37° C
Product Size: 25 units
Sensitive to Heat Inactivation: Yes


Manuals & protocols

Recommended products