{"product_id":"neb-r0572s","title":"New England Biolabs, R0572S, BsmFI","description":"The large size of this product was discontinued on December 15, 2025. The small size will remain available.  \u003cb\u003eRelated Categories\u003c\/b\u003e Restriction Endonucleases B  \u003cb\u003eApplications\u003c\/b\u003e Restriction Enzyme Digestion  \u003cb\u003eSpecification\u003c\/b\u003e \u003cb\u003eUnit Definition\u003c\/b\u003e One unit is defined as the amount of enzyme required to digest 1 µg of pBR322 DNA in 1 hour at 37°C in a total reaction volume of 50 μl.  \u003cb\u003eReaction Conditions\u003c\/b\u003e 1X rCutSmart™ Buffer Incubate at 37°C 1X rCutSmart™ Buffer 50 mM Potassium Acetate 20 mM Tris-acetate 10 mM Magnesium Acetate 100 µg\/ml Recombinant Albumin (pH 7.9 @ 25°C)  \u003cb\u003eActivity in NEBuffers\u003c\/b\u003e NEBuffer™ r1.1: 25% NEBuffer™ r2.1: 50% NEBuffer™ r3.1: 50% rCutSmart™ Buffer: 100%  \u003cb\u003eDiluent Compatibility\u003c\/b\u003e Diluent A  \u003cb\u003eStorage Buffer\u003c\/b\u003e 10 mM Tris-HCl 50 mM NaCl 1 mM DTT 0.1 mM EDTA 200 µg\/ml Recombinant Albumin 50% Glycerol pH 7.4 @ 25°C  \u003cb\u003eHeat Inactivation\u003c\/b\u003e 80°C for 20 minutes  \u003cb\u003eMethylation Sensitivity\u003c\/b\u003e dam methylation: Not Sensitive dcm methylation: Blocked by Overlapping CpG Methylation: Blocked by Overlapping  \u003cb\u003eFAQ\u003c\/b\u003e Q: Are there single cleavage sites in any common vectors for BsmFI? A: Yes. The polylinkers found in pACYC177 cloning vectors contain a single BsmFI site. Q: Is there variability in the cleavage site for BsmFI? A: Yes. BsmFI recognizes GGGAC and cleaves 10\/14 bases downstream, but sometimes cleaves 9\/13. Q: I tested your restriction enzyme on the substrate DNA recommended by NEB, and it appears to be active, however it does not digest my DNA. What could be the reason? A: The quality and cleanliness of the DNA are major factors that can affect enzyme activity. Restriction Enzymes active in rCutSmart® Buffer, but not as active in NEBuffer r2.1 and\/or r3.1 (our higher salt buffers), can be inhibited by salt in the reaction. DNA purification procedures that use spin columns can result in DNA solutions with significant levels of salt that can carry over into the reaction and inhibit enzyme activity. To prevent this, we recommend that the DNA solution added to the reaction be no more than 25% of the total reaction volume. This can be attained by adjusting the total reaction volume accordingly. Q: Is this enzyme sensitive to dam, dcm or mammalian CpG methylation? A: Yes. This enzyme cannot cut recognition sites that are blocked by overlapping dcm methylation or by overlapping CpG methylation. For up-to-date information about methylation sensitivities, please visit Dam-Dcm and CpG Methylation or REBASE. Q: Can you tell me more about the switch from BSA to Recombinant Albumin (rAlbumin) in NEBuffers? A: NEB is excited to announce that we have switched BSA-containing reaction buffers (NEBuffer 1.1, 2.1, 3.1 and CutSmart® Buffer) to Recombinant Albumin-containing buffers (NEBuffer r1.1, r2.1, r3.1 and rCutSmart™ Buffer). We are also in the process of moving all restriction enzyme formulations to contain rAlbumin. We feel that moving away from animal-containing products is a step in the right direction and are able to offer this enhancement at the same price. Q: Are certain restriction enzymes more active at higher incubation temperatures than what is recommended? A: NEB restriction enzymes are 100% active at the recommended incubation temperature in the recommended buffer provided with each enzyme. With some restriction enzymes isolated from thermophilic species, you may see increased activity at higher incubation temperatures. We do not recommend increasing the temperature as additional nuclease activities may appear at non-recommended temperatures. ","brand":"New England Biolabs","offers":[{"title":"Default Title","offer_id":46835508314281,"sku":"R0572S","price":0.99,"currency_code":"USD","in_stock":true}],"url":"https:\/\/iright.com\/products\/neb-r0572s","provider":"Iright","version":"1.0","type":"link"}