What space Tris Acetate EDTA and also Tris Borate EDTA?

Tris acetate EDTA (TAE) and also tris borate EDTA (TBE) space the 2 most typical running buffers supplied in nucleic mountain electrophoresis. Together buffers, they have actually a fairly constant pH and are maybe to conduct electricity because of their concentration the hydrogen ions. This properties are essential for gelatin electrophoresis throughout which proteins space separated by electric charge.

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Preparing to run Buffers

TBE and also TAE room most often mixed from your constituent parts into laboratory share solutions. Both buffers have the right to be purchased at the functioning concentration or in a powdered or focused format that is merely prepared via dilution.Refer come the recipes below to prepare TAE and TBE in usual stock systems concentrations. Our buffer calculator have the right to also help you find the exactly dilution (or conversion) for miscellaneous buffers from stock systems to a preferred molarity and also volume.

Video: TAE and also TBE Buffers for gelatin Electrophoresis

Review typical TAE and TBE buffer solution recipes and also learn which to run buffer to choose for your main point acid gelatin electrophoresis application. Research modern technology specialist kris Lemke mixes up share solutions and also provides advantageous buffer choice tips.

This video clip was constructed in cooperation with Seeding Labs, a nonprofit that connects universities and research institutes in emerging countries through high-quality excess lab equipment, training, and also professional exchanges.

TAE Buffer 50x share Recipe

242 g tris base in double-distilled H2O57.1 ml glacial acetic acid100 ml 0.5 M EDTA systems (pH 8.0)

Adjust volume come 1 L.

10x TAE Recipe

For 1L that 10x solution,

48.5 g tris11.4 mL glacial acetic acid20 mL 0.5M EDTA (pH 8.0)

1x TAE Recipe

Dilute 1:10

0.4 M tris acetate (pH around 8.3)0.01 M EDTA

using ultrapure water.

TBE Buffer 10x stock Recipe

108 g tris base55 g boric acid900 ml double-distilled H2O40 ml 0.5 M EDTA systems (pH 8.0)

Adjust volume come 1 L.

1x TBE Preparation

Dilute 10x concentrated TBE buffer 10-fold through ultrapure water.

The final solution have to contain:

0.13 M tris (pH 7.6)45 mM boric acid2.5 mM EDTA

Buffer prepare Tips

If precipitation is present, warmth to 37 °C and also mix until completely dissolved prior to dilution.It is recommended 1x working services be filtered v a 0.2 mm filter before use.1x functioning solutions can be supplied until the expiration date on packaging v storage at room temperature. Discard if buffer i do not care cloudy or discolored.


Tris-acetate-EDTA (TAE) running buffer and also tris-borate-EDTA (TBE) are generally used buffers for DNA agarose gelatin electrophoresis that room especially helpful in preparative work.1

Compared come tris-borate-EDTA (TBE) and tris-phosphate-EDTA (TPE) buffers, double-stranded DNA often tends to run quicker in TAE. However, because TAE has actually the lowest buffering volume of the 3 buffers, the buffering capacity can become exhausted throughout extended electrophoresis. Buffer circulation or replacement deserve to remedy this situation.


The 1x TAE buffer is offered both in the agarose gel and as a running buffer. Used voltages that 2

TAE buffer has actually been utilized in agarose gelatin electrophoresis of RNA.3,4

A study of cost-free DNA systems mobility in TAE at various buffer concentrations, in the visibility and lack of added NaCl, has been reported.5

The usage of TAE buffer in a denaturing gradient gel electrophoresis technique for broad-range mutation evaluation has been described.


TBE buffer is recommended for resolution the RNA and DNA pieces smaller than 1500 bp.

TBE is used with both non-denaturing or denaturing (7 M urea) gels.

It is additionally routinely provided for DNA automatic sequencing gel.

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Tris-borate-EDTA buffer has been used for pulsed-field gelatin electrophoresis (PFGE). Used voltages of much less than 5 V/cm room recommended because that maximum resolution.

Bionic Buffer is a unique different to classic TBE (tris-borate-EDTA) and also TAE (tris-acetate-EDTA) electrophoresis buffers. Bionic Buffer allows for:

Band resolution in minutesRunning gelatin 2-3x faster than in TBE/TAESharper bands in much less timeUse v pre-cast gels