Data last updated: 2011-12-31; REBASE version 201
This track shows restriction enzyme recognition sites. At different browser zoom levels
(categorized in the table below by the number of bases visible), different sets of enzymes are
shown. "Base-level" refers to the browser zoom level at which individual bases are
displayed in the Base Position track. Displays of custom enzyme sets override the table: in these
cases, the restriction sites are consistent across all zoom levels. "Primary" enzymes are the
canonical isoschizomer for each cutsite, usually the first isolated or most readily available.
The base-level display shows the detail of the cutting pattern of the enzyme as well as the
presence of any ambiguous or redundant nucleotides in the cutsite. The four standard bases, G, A,
T and C, are displayed in black, whereas non-unique bases using
IUPAC designations (R, Y, N, etc) are displayed in
The term "isoligamer" in the enzyme details section was coined to designate enzymes that
produce single-stranded overhanging "sticky" ends that are ligatable to each other.
|Zoom level (in bases)||Enzyme set displayed
||All "primary" enzymes from REBASE
|Base-level - 2,999
||Restriction sites for "primary" enzymes five bases and larger.
|3,000 - 19,999
||Restriction sites for "primary" enzymes six bases and larger
|20,000 - 249,999
||The following set of commonly-used enzymes: ClaI, BamHI, BglII, EcoRI, EcoRV, HindIII, PstI,
SalI, SmaI, XbaI, KpnI, SacI, SphI
Thanks to REBASE
for providing these data.