Thermostable DNA Polymerase
Thermus aquaticus, recombinant, E. coli
For in vitro use only!
Unit Definition: One unit is defined as the amount of the enzyme required to catalyze the incorporation of 10 nmoles of dNTP's into an acid-insoluble form in 30 minutes at 70 °C using hering sperm DNA as substrate.
Shipping: shipped on blue ice
Storage Conditions: store at -20 °C
avoid freeze/thaw cycles
Shelf Life: 12 months
Concentration: 5 units/μl
Taq Polymerase is recommended for routine PCR applications (up to 4 kb fragment length), high throughput PCR or genotyping. The buffer system guarantees robust and reliable amplification results in almost all PCR applications. The Crystal Buffer contains a well-balanced ratio of potassium-, ammonium- and magnesium-ions to ensure high specificity and minimal by-product formation without the need of additional optimization steps.
Ruby Buffer additionally contains gel loading buffer and an inherent red dye. The red dye allows an easy visual control during PCR set-up and in combination with the density reagent the direct loading of the reaction product into the gel.
The enzyme replicates DNA at 72 °C. It catalyzes the polymerization of nucleotides into duplex DNA in 5'→3' direction in the presence of magnesium. It also possesses a 5'→3' polymerization-dependent exonuclease replacement activity but lacks a 3'→5' exonuclease (proof-reading) activity.
Taq Polymerase (red cap)
5 units/μl Taq DNA Polymerase in 20 mM Tris-HCl, 100 mM KCl, 0.1 mM EDTA, 1 mM DTT, 0.5 % Tween-20, 0.5 % Nonidet P-40, 50 % (v/v) Glycerol, pH 8.0 (25°C)
Ruby Buffer (black cap)
10 x conc. complete PCR buffer containing 200 mM Tris-HCl, KCl, (NH4)2SO4 and 20 mM MgCl2, red tracking dye and density reagent for gel loading
Crystal Buffer (green cap)
10 x conc. complete PCR buffer containing 200 mM Tris-HCl, KCl, (NH4)2SO4 and 20 mM MgCl2
/ 40 μl
/ 200 μl
/ 1 ml
|Ruby Buffer||1.2 ml||5 x 1.2 ml||25 ml|
|1.2 ml||5 x 1.2 ml||25 ml|
Before starting, vortex all components thoroughly to ensure homogeneity.
Prepare a premix for the number of assays you need according to the following protocol:
|comp.||cap||stock conc.||final conc.||1 assay @ 20 μl||1 assay @ 50 μl|
|PCR-grade Water||white||fill up to 20 μl||fill up to 50 μl|
|Ruby Buffer or Crystal Buffer||black or green||10x||1x||2 μl||5 μl|
|dNTP Mix / 10 mM #NU-1006||white||10 mM||200 μM||0.4 μl||1 μl|
|Taq Polymerase||red||5 units/μl||0.025 units/μl||0.1 μl||0.25 μl|
|primer mix or each primer||10 μM each primer||200 - 400 nM each primer||0.4-0.8 μl||1 - 2 μl|
|10 μl < 10 ng DNA||20 μl < 20 ng DNA|
Spin down the tubes/plate briefly to remove bubbles and place them into the cycler.
|95 °C||2 min||1x|
50 - 68 °C
|10 - 20 sec|
10 - 20 sec
20 sec - 4 min
25 - 35x
Gel Loading and Down-Stream Applications:
Ruby Buffer (#PCR-272) includes a density reagent + tracking dye and allows the direct loading of the PCR products into a electrophoresis gel. For DNA detection / fluorescent DNA staining we recommend to use new generations dyes (i.g. SYBR DNA Stain, #PCR-273) instead of the classical but highly mutagenic ethidium bromide.
Crystal Buffer(#PCR-271) is recommended for down-stream applications such as DNA sequencing, ligation, restriction digestion or where an analysis of the PCR product by absorbance or fluorescence excitation is required. For gel electrophoresis add gel loading buffer and fluorescent DNA stain (i.g. Gel Loading Buffer with DNA Stain, #PCR-274 - #PCR-276) before loading the PCR into the gel. Using pre-stained gels or post-run staining protocols is also possible.
Additional Buffer Systems:
Labeling Buffer (#PCR-263) is recommended for DNA labeling or mutagenesis applications. The buffer is specially optimized for incorporation of labeled or modified nucleotides into DNA. It gives superior results in a broad range of reaction conditions with most primer-template pairs but amplification may also tend to an increased unspecifity.
KCl Buffer (#PCR-262) is recommended for use in routine PCR reactions. The buffer is optimized for highest specificity but may require additional fine-tuning of assay parameters like MgCl2 concentration and annealing temperature.
Optimization of MgCl2 concentration:
A final Mg2+ concentration of 2.0 mM is recommended in combination with Labeling Buffer. However, if an individual Mg2+ optimization is essential add 25 mM MgCl2 stock solution (#PCR-266) as shown in the table below.
|final MgCl2 conc.||20 μl final assay volume||50 μl final assay volume|
|3 mM||0.8 μl||2.0 μl|
|4 mM||1.6 μl||4.0 μl|
|5 mM||2.4 μl||6.0 μl|
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