Due to the Martin Luther King Jr. Day on Monday - orders placed Friday, January 17 will be shipped on Monday, January 20 for delivery Tuesday, January 21 .

USER® Enzyme
icon_cloned icon_recomb icon_CutSmart icon_incTemp37 icon_HI_no

A thermolabile version is also available, Thermolabile USER II Enzyme (NEB #M5508).

USER (Uracil-Specific Excision Reagent) Enzyme (1) generates a single nucleotide gap at the location of a uracil residue.

Applications of USER include:

  • Directional RNA Seq
  • NEBNext adaptor cleavage
  • USER cloning


USER Enzyme

Uracil DNA glycosylase (UDG) catalyzes the excision of a uracil base, forming an abasic (apyrimidinic) site while leaving the phosphodiester backbone intact. The lyase activity of Endonuclease VIII breaks the phosphodiester backbone at the 3´ and 5´ sides of the abasic site so that base-free deoxyribose is released. USER (Uracil-Specific Excision Reagent) Enzyme, combines these two enzymatic activities to generate a single nucleotide gap at the location of a uracil residue.

Learn more about how this product is being used in the Product Citation Tool
Catalog # Concentration Size List Price Your Price Quantity
M5505S 1,000 units/ml 50 units $74.00
M5505L 1,000 units/ml 250 units $297.00
Please enter a quantity for at least one size

Loading Spinner