ApaL I is a restriction enzyme purified from Acetobacter pasteurianus (ATCC 12875).

Unit substrate: Lambda DNA.

Unit calculation assay conditions: 10 mM Tris-HCl (pH 7.9 @ 25^oC), 10 mM MgCl2, 1 mM dithiothreitol, 100 μg/ml bovine serum albumin and DNA. Incubate at 37^oC.

Absence of contaminants:  100 units of ApaL I do not produce any unspecific cleavage products after 16 hrs incubation with 1 μg of lambda DNA at 37^oC. After 100-fold overdigestion with ApaL I, greater than 98% of the DNA fragments can be ligated and recut with this enzyme.

Storage buffer: 50 mM KCl, 10 mM Tris-HCl (pH 7.4), 0.1 mM EDTA, 1 mM dithiothreitol, 200 μg/ml bovine serum albumin and 50% glycerol. Store at -20^oC.

Heat inactivation: No.

Methylation Sensitivity:

dam methylation: Not sensitive

dcm methylation: Not sensitive
CpG methylation: Blocked by overlapping