Thermo Scientific™

Esp3I (BsmBI) (10 U/µL)

Catalog number:  ER0451

Related applications:

Restriction Enzyme Cloning

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5'  C  G  T  C  T  C  N1 3'
3'  G  C  A  G  A  G  N5 5'

Thermo Scientific Esp3I (BsmBI) restriction enzyme recognizes CGTCTC(1/5)^ sites and cuts best at 37°C in Tango (+DTT) 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. Note: Also available as a FastDigest enzyme for rapid DNA digestion. Isoschizomers: BsmBI.

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 sent 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: The enzyme requires DTT. Freshly made DTT should be added to the reaction buffer. Esp3I cleaves downstream of its recognition site and can generate any desired 4 base 5'-overhangs. This feature is useful for PCR product cloning. For methylation sensitivity, refer to product specifications.
For Research Use Only. Not for use in diagnostic procedures.


Quantity: 200U
Methylation Sensitivity: Not dam methylation-sensitive, Not dcm methylation-sensitive, CpG methylation-sensitive
Enzyme: Esp3I (BsmBI)
Compatible Buffer: 10x Buffer Tango
Sensitive to Heat Inactivation: Yes
Optimal Reaction Temperature: 37° C
Type IIS RE: No