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商品編號


P7020-LC-L



品牌


Enzymatics



公司


Enzymatics,inc



公司分類(lèi)


Ultrapure Polymerases



Size

2,000 U

商品信息

φ29 DNA Polymerase (Low Concentration)


Product Description

φ29?DNA Polymerase respons
IBL
e for the replication of the?
Bacillus Subtilis
?phage φ29 (1). The enzyme is a highly processive DNA polymerase (up to 70,000 base insertions per binding event) with a powerful strand displacement activity (2) and a 3′→ 5′ proofre
ADI
ng exonuclease function (3).

Source of Protein
A recombinant?
E. coli
?strain carrying the φ29 DNA Polymerase gene from bacteriophage φ29.

Supplied in?
10 mM Tris-HCl
100 mM KCl
0.1 mM EDTA
1 mM DTT
0.5% Tween-20
0.5% NP-40
50% glycerol
pH 7.4 @ 25°C

Supplied With
B7020 (10X φ29 DNA Polymerase Reaction Buffer)

10X φ29 DNA Polymerase Buffer (B7020)
500 mM Tris-HCl
100 mM (NH
4
)
2
SO
4
40 mM DTT
100 mM MgCl
2
pH 7.5 @ 25°C

Unit Definition
1 unit is defined as the amount of polymerase required to convert 0.5 pmol of dTTP into acid insoluble material
in 10 minutes at 30°C.



Quality Control Analysis

Unit Characterization Assay
Unit activity was measured using a 2-fold serial dilution method. Dilutions of enzyme were made in 1X φ29 DNA Polymerase reaction buffer and added to 50 ?L reactions containing λ Hind III DNA, 1X φ29 DNA Polymerase Reaction Buffer,?
3
H-dTTP, 0.2 ?M dTTP and 200 ?M dATP, dCTP, dGTP. Reactions were incubated 10 minutes at 30°C, plunged on ice, and analyzed using the method of Sambrook and Russell (
Molecular Cloning, v3, 2001, pp. A8.25-A8.26
).

Protein Concentration (OD
280
) Measurement
A 2.0 ?L sample of enzyme was analyzed at OD
280
?using a
Nanodrop
ND-1000 spectrophotometer standardized using a 2.0 mg/ml BSA sample (
Pierce
Cat #23209) and blanked with product storage solution. The observed average measurement of 3 replicate samples was converted to mg/mL using an extinction coefficient of 111,230 and molecular weight of 66,713 Daltons.

SDS-Page (Physical Purity Assessment)
2.0 ?L of concentrated enzyme solution was loaded on a denaturing 4-20% Tris-Glycine SDS-PAGE gel flanked by a broad-range MW
Marker
and 2.0 ?L of a 1:100 dilution of the sample. Following electrophoresis, the gel was stained and the samples compared to determine physical purity. The acceptance criteria for this test requires that the aggregate mass of contaminant bands in the concentrated sample do not exceed the mass of the protein of interest band in the dilute sample, confirming greater than 99% purity of the concentrated sample.



Contamination Tests

Single-Stranded Exonuclease Activity
A 50 ?L reaction containing 10,000 cpm of a r
ADI
olabeled single-stranded DNA substrate and 10 ?L of enzyme solution incubated for 4 hours at 37°C resulted in greater than 80% release of TCA-soluble counts.

Double-Stranded Endonuclease Activity
A 50 ?L reaction containing 0.5 ?g of pBR322 DNA and 10 ?L of enzyme solution incubated for 4 hours at 37°C resulted in no visually discern
IBL
e conversion to nicked circular DNA as determined by agarose gel electrophoresis..

E.coli
?16S rDNA Contamination Test
Replicate 5 ?L samples of enzyme solution were denatured and screened in a TaqMan qPCR assay for the presence of contaminating?
E.coli
?genomic DNA using oligonucleotide primers corresponding to the 16S rRNA locus. The acceptance criterion for the test is the threshold cycle count (C
t
) produced by the average of 3 replicate no template control samples. Based on the correlation between the no template control C
t
?values, and standard curve data, the detection limit of this assay is <10 copies genome/sample.


View PDF Poster Instructions FAQ


Product Information



φ29 DNA Polymerase (Low Concentration)


Part Number
P7020-LC-L
Price
$363
Concentration
10,000 U/ml
Unit Size
2,000 U


SDS

Available on request








Product Specification*


Storage Temperature
-25 to -15°C


Test

Specification


Purity (SDS-PAGE)
>99%
Specific Activity
83,333 U/mg
SS Exonuclease
Functional
DS Endonuclease
100 U = no conversion
E.coli
DNA Contamination
100 U <10 copies





* For a detailed summary of assay conditions and data, refer to the Quality Controls Analysis section.

References


Blanco, L. and Salas, M. (1984)
Proc. Natl. Acad. Sci. USA,
81, 5325-5329.

Blanco, L. et al. (1989)
J. Biol. Chem.
, 264, 8935-8940.

Garmendia, C. et al. (1992)
J. Biol. Chem.
, 267, 2594-2599.


Legal Disclaimer

Certain applications of
Enzymatics
products may require licenses from others. Please consult with your legal counsel to evaluate your own use of
Enzymatics
products, if you have any questions please contact legal@
Enzymatics
.com.



Limitations of Use
This product was developed, manufactured, and sold for in vitro use only. The product is not suitable for admi
NIST
ration to humans or animals. SDS sheets relevant to this product are available upon request.