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R1386

Sigma-Aldrich

RNA Sample Loading Buffer

for NA electrophoresis, without ethidium bromide

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Select a Size

EC Number:
MDL number:
NACRES:
NA.25

grade

for molecular biology

Quality Level

form

solution

foreign activity

RNase, none detected

storage temp.

−20°C

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This Item
G765457479593290
Sigma-Aldrich

Sigma-Aldrich

G7654

Gel Loading Solution

-
Sigma-Aldrich

Sigma-Aldrich

93290

TRIS borate – EDTA buffer solution

Essential+ Grade
form

solution

form

solution

form

liquid

form

solution

foreign activity

RNase, none detected

foreign activity

-

foreign activity

DNase, RNase, protease, none detected

foreign activity

-

storage temp.

−20°C

storage temp.

2-8°C

storage temp.

15-25°C

storage temp.

room temp

Quality Level

200

Quality Level

100

Quality Level

-

Quality Level

100

General description

RNA loading buffer is used as a tracking dye during RNA electrophoresis. The dye has a slight negative charge and will migrate the same direction as RNA, allowing the user to monitor the progress of molecules moving through the gel. The rate of migration varies with gel composition. Dilute 1:3 to 1:6 with sample, heat to 65C for ten minutes and chill on ice before loading.

Application

RNA sample loading buffer is especially formulated for electrophoresis of RNA on formaldehyde-agarose gels with or without ethidium bromide. Ethidium bromide is not recommended for gel staining prior to Northern blot detection because the presence of ethidium bromide in agarose gels or the loading buffer can cause poor transfer efficiency.
Suitable for use with formaldehyde-agarose gels used in Northern blotting procedures.

Components

Deionized formamide 62.5% (v/v), formaldehyde 1.14 M, bromphenol blue 200 μg/mL, xylene cyanole 200 μg/mL, MOPS-EDTA-sodium acetate at 1.25× working concentration.
RNA loading buffer contains 62.5% deionized formamide, 1.14M formaldehyde, 200 μg/ml bromphenol blue, 200 μg/ml xylene cyanole, in MOPS-EDTA-sodium acetate at 1.25x working concentration.

Quantity

Recommended usage: Add 1 volume sample to 2-5 volumes of sample loading buffer and mix well. The sample should be heated to 65 °C for 10 minutes, and then chilled on ice immediately before loading on the gel.

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