FastDigest SmiI

The FastDigest Buffers can be stored at 4 degrees C for at least 6 months. For long-term storage until their expiration, we recommend storing the FastDigest and FastDigest Green Buffers at -20 degrees C.

Our general recommendation is to use 5-10 µL of FastDigest enzymes with 100 µg DNA in 500 µL and 10-20 µL of the FastDigest enzymes with 200 µg DNA in 1 mL. Incubate the reaction for 16 h (or the longest recommended incubation time if the particular enzyme is prone to star activity) at the recommended temperature. Optimal conditions may vary as complete digestion of DNA depends on the nature of the particular FastDigest restriction enzymes and the DNA substrates.

The concentration of FastDigest enzymes is proprietary information. The FastDigest enzyme activity is measured by FastDigest unit (FDU): 1 µL of enzyme (1 FDU) cleaves 1 µg of DNA substrate in 5-15 min at 37 degrees C in 20 µL of 1X FastDigest buffer.

Yes, the FastDigest Buffer (Cat. No. B64) and the FastDigest Green Buffer (Cat. No. B71) can be purchased separately.

The FastDigest Green Buffer offers the same performance as the colorless FastDigest Buffer but enables direct loading of the reaction mixture on gels. The 10X FastDigest Green Buffer includes a density reagent and two tracking dyes for direct loading. The blue dye migrates with 3-5 kb DNA fragments in a 1% agarose gel and has an excitation peak of 424 nm. The yellow dye migrates faster than 10 bp DNA fragments in a 1% agarose gel and has an excitation peak of 615 nm.

Find additional tips, troubleshooting help, and resources within our Restriction Enzyme Cloning Support Center.