R6265

EcoR I from Escherichia coli BS5

Restriction Enzyme

• CAS Number: 80498-17-5
• Enzyme Commission number: 3.1.21.4 (BRENDA, IUBMB)
• EC Number: 279-487-9
• MDL number: MFCD00163532
• NACRES: NA.53

Properties

• Quality Level: 200
• grade: for molecular biology
• form: buffered aqueous glycerol solution
• concentration: 10,000 units/mL
• shipped in: wet ice
• storage temp.: −20°C

Description

Specificity

Recognition sequence: 5′-G/AATTC-3′
Cutting results: a 2-10-fold EcoR I overdigestion of 1 μg λ DNA substrate results in 100% cutting
Heat inactivation: 65 °C for 20 minutes.

Application

EcoRI is a restriction endonuclease that is used in molecular biology applications to cleave DNA at the recognition site 5′-G/AATTC-3′, generating fragments with 5′-cohesive termini.

Other Notes

Supplied with 10x Restriction Enzyme Buffer SH (B3657).

Comment: Avoid suboptimal reaction conditions such as low salt, high pH (>8.0) and high glycerol (>5%) as they will alter EcoRI specificity and precipitate star activity.

Unit Definition

One unit is the enzyme activity that completely cleaves 1 mg of λDNA in 1 hour at 37 °C in a total volume of 50 ml of 1x digestion buffer SH for restriction enzymes. 1 mg pBR322 DNA is digested completely by 2 units of EcoR I.

Physical form

Solution in 10 mM Tris-HCl, pH 7.2 , 1 mM EDTA, 200 mM NaCl , 0.5 mM dithioerythritol, 50% glycerol (v/v), 0.2% Triton X- 100 (v/v), 4°C