Modify diverse 5’ ends of dsDNA.
Supplied at 5,000 U/mL in 25 mM Tris-HCl, 50 mM NaCl, 1.0 mM Dithiothreitol, 0.1 mM EDTA, 50% Glycerol, pH 7.5 @ 25°C. Also supplied is 10X Lambda Exo Reaction buffer which in 1X form is composed of 67 mM Glycine, 2.5 mM MgCl2, pH 9.4 @ 25°C. 25,000 U is supplied as 5 × 5,000 U.
Lambda Exonuclease selectively degrades the 5′-phosphorylated (but not 5'-hydroxyl) strand of dsDNA. It is a highly processive enzyme that does not initiate at nicks or gaps, though it will degrade a 5′-overhanging tail from dsDNA non-preferentially.
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Specifications
Unit Definition: One unit is defined as the amount of enzyme required to produce 10 nmol of acid-soluble deoxyribonucleotide from double-stranded substrate in 30 minutes at 37°C.
Source: Purified from a strain of E. coli that overexpresses the exonuclease gene from bacteriophage Lambda.
| Unit Concentration | 5,000 U/mL |
| Purity (SDS-PAGE) | >99% |
| Endonuclease | 1500 U <10% converted |
| E.coli 16S rDNA Contamination | 1500 U <10 copies |
| Storage | -20°C |
| Document | File Name | Type |
| Manual | MA124-Lambda | |
| Product Flyer | NexGen-Enzymes-2011 | |
| MSDS |