Unit definition: One unit is defined as amount of enzyme required to produce a complete digest of 1 µg Lambda DNA in 60 min in a total reaction volume of 50µL under the assay conditions.
Unit substrate: Lambda DNA
Unit calculation assay conditions: 100 mM KCl, 10 mM Bis-Tris-Propane (pH 7.0 @ 25°C), 10 mM MgCl2, 100 μg/ml BSA. Incubate at 37°C.
Absence of contaminants: 50 units of ScaI do not produce any unspecific cleavage products after 16 hrs incubation with 1µg of Lambda DNA at 37 °C. After 10-fold overdigestion with ScaI, greater than 90% of the DNA fragments can be ligated and recleaved with this enzyme.
Storage buffer: ScaI is supplied in 50 mM KCl, 10mM Tris-HCl (pH 7.4), 0.1 mM EDTA, 1 mM DTT, 500 μg/ml BSA and 50% glycerol.
Inactivation: ScaI can be heat inactivated in 20min at 80 °C. The enzyme can be removed by spin column purification. It is also possible to stop the digest by addition of EDTA to a final concentration of >10mM or SDS to a concentration of 0.1 %. Alternatively use our environmentally friendly 6x orange gel loading buffer. For further enzymatic reactions remove SDS or EDTA by spin column-based PCR purification kit.
Star activity: Large excess of the enzyme may result in the appearance of star activity.
dam methylation: Not sensitive
dcm methylation: Not sensitive
CpG Methylation: Not sensitive
Activity in Simplebiotech buffers:
10x UScaI Buffer: 1000 mM KCl, 100 mM Bis-Tris-Propane (pH 7.0 @ 25 °C), 100 mM MgCl2, 1 mg/ml bovine serum albumin.
General reaction mixture:
10x UScaI 2 µL
DNA (0.5-1µg) 1µL
10 U ScaI 1 µL
Nuclease free water 16 µL
Final volume 20µL
Incubate at 37 °C for 15 minutes.
Always add the restriction enzymes as last component. Mix gently but thoroughly by pipetting up and down or flicking. Spin down.
Incubate at 37 °C for 15min. Restriction enzymes are stored in 50% glycerol. The glycerol concentration in the reaction mix should not exceed 10%. When digesting more than 1µg DNA, scale up the restriction mix or prolong the incubation time.