(주)모아바이오

Biotechrabbit

[Biotechrabbit] Pfu DNA Polymerase, 2.5 U/µl

Cat-No. BR0300101

Biotechrabbit은 바이오의약품 및 생명과학 연구를 위한 고급 실험 재료와 서비스를 제공하는 회사입니다.

제품 설명

Pfu DNA Polymerase, 2.5 U/µl

제품 번호

BR0300101 - 100 Units

BR0300102 - 500 Units

제품 특징

Features

Accurate PCR for demanding applications
Approximately ten times higher accuracy than Taq DNA Polymerase
Proof-reading for increased fidelity

Applications

High-fidelity PCR
Generation of PCR products for blunt cloning
Site directed mutagenesis

Description

biotechrabbit™ Pfu DNA Polymerase is a highly purified thermostable recombinant proofreading DNA polymerase. Pfu DNA Polymerase exhibits approximately 10 times higher accuracy than Taq DNA polymerase and amplifies targets up to 3–4 kb in size.

The enzyme catalyzes template-dependent nucleotide polymerization in the 5'→3' direction. Additionally the 3'→5' exonuclease (proofreading) activity corrects nucleotide incorporation errors, thereby increasing fidelity and accuracy of DNA polymerization. The enzyme has no 5'→3' exonuclease activity and no detectable reverse transcriptase activity and produces blunt-end PCR products.

For the most demanding applications, the supplied 5× PCR Enhancer can be optionally used for improving results when using templates with GC-rich sequences and complex structures.

Other Information

Component	Composition
Pfu DNA Polymerase	Pfu DNA Polymerase, 2.5 U/µl, in storage buffer containing 50% (v/v) glycerol
10× Pfu Reaction Buffer	Optimized PCR reaction buffer including magnesium ions
5× PCR Enhancer	Proprietary PCR enhancer mix

STORAGE

−20°C (until expiry date – see product label)

Unit Definition

One unit catalyzes the incorporation of 10 nmol of deoxyribonucleotides into a polynucleotide fraction in 30 minutes at 72°C.

Quality Control

Functional assay

Human genomic DNA was amplified using the DNA Polymerase and specific primers to produce a distinct band of 750 bp.

Self-priming activity

Standard PCR is carried out without primers, using the DNA Polymerase and human genomic DNA. No products were amplified.

Exonuclease/Endonuclease assay

lambda DNA is incubated with the DNA Polymerase in a 50 µl reaction mixture for 4 h at 37°C. No degradation of DNA was observed.

Nick Activity

Supercoiled plasmid DNA is incubated with the DNA Polymerase in a 50 µl reaction mixture for 4 h at 37°C. No conversion of covalently closed circular DNA to nicked DNA was detected.

E. coli DNA contamination assay

A sample of the denatured DNA Polymerase is analyzed with specific primers targeting the 16S rRNA gene in qPCR for the presence of contaminating E. coli DNA. No E. coli DNA was detectable.

Protocols

Prevention of PCR contamination

When assembling the amplification reactions, care should be taken to eliminate the possibility of contamination with undesired DNA.

Use separate clean areas for preparation of samples and reaction mixtures and for cycling.
Wear fresh gloves. Use sterile tubes and pipette tips with aerosol filters for PCR setup.
Use only water and reagents that are free of DNA and nucleases.
With every PCR setup, perform a contamination control reaction that does not include template DNA.

Standard PCR setup

The standard PCR protocol using biotechrabbit reaction buffer provides excellent results for most applications. Optimization might be necessary for certain conditions, such as the amplification of long targets, high GC or AT content, strong template secondary structures or insufficient template purity. In such cases, optimization of template purification (see biotechrabbit nucleic acid purification kits), primer design and annealing temperature is recommended.

The best conditions for each primer-template can be optimized with the following:

Choosing the optimal quantities of template and primers
Determining optimal concentrations of the enzyme and magnesium ions
Optimizing cycling conditions

If unspecific amplification occurs, the amount of DNA Polymerase and the primer concentration can be reduced. Correspondingly, these can be increased when yield is low.

Basic Protocol

Optionally, use the supplied 5× PCR Enhancer to increase the yield and to lower the background in more complicated PCR reactions (low amounts of template, impure or GC-rich template).
Thaw on ice and mix all reagents well, especially the MgCl₂ solution and dNTPs.
Keep all reagents and reactions on ice.
When setting up multiple reactions, prepare a master mix of water, buffer, dNTPs and polymerase. Prepare enough master mix for one more than the actual number reactions. Alternatively, use biotechrabbit Pfu PCR Master Mix, 2× (cat. no. BR0300201)
Pipet the master mix into thin-walled 0.2 ml PCR tubes.
Add template and primers separately if they are not used in all reactions.

Component	Volume	Final concentration
10× Pfu Reaction Buffer	5 µl	1×
5× PCR Enhancer (optional - BR1900201)	10 µl	1×
10 mM dNTP Mix	1 µl	200 µM
Forward primer	Variable	0.2–1 µM
Reverse primer	Variable	0.2–µM
Template DNA	Variable	10 pg–1 μg
	Use 0.01–1 ng for plasmid or phage DNA and 0.1–1 μg for genomic DNA
Pfu DNA Polymerase (2.5 U/µl)	0.5–1 µl	1.25–2.5 U
Nuclease free water	Variable
Total volume	50 µl

Mix and centrifuge briefly to collect the liquid in the bottom of the tube.
Place in the PCR cycler.

Cycling Program

Step	Temperature	Time	Cycles
Initial activation	95°C	2 min	1
Denaturation	95°C	30 s	25–35
Annealing	55°C	30–45 s	25–35
	Approximately 5°C below T_m of primers
Extension	72°C	2 min/kb	25–35
Final extension	72°C	5 min	1
	To extend all incomplete PCR products
Storage in the cycler	4°C	Indefinitely	1

Add loading dye solution (see DNA Loading Dye, 6×, cat. no. BR0800301) to the reactions to analyze PCR products on a gel or store them at −20°C.
For cloning, always purify the PCR product from a gel (see BR0700501 GenUP™ PCR/Gel Extraction Kit).

Biotechrabbit에서 다양한 제품을 찾아보세요!

Biotechrabbit - Official Distributor in South Korea "Morebio" 한국 공식 대리점 "모아바이오"

제품소개

제품상세페이지