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Product Description

The Blue Loading Buffer Pack is used to lyse cells for Western blotting analysis


Product Usage Information

1. Prepare fresh 3X Reducing SDS Loading Buffer by adding 1/10 volume 30X DTT Reducing Agent to 1 volume of 3X SDS Loading Buffer.

2. Dilute 3X SDS Loading Buffer to a 1X solution using ddH2O. This product supplies enough 3X material to make 24ml of 1X solution.     

3. Aspirate media from cultures; wash cells with 1X PBS; aspirate.

4. Lyse cells by adding 1X SDS Loading Buffer (100 µl per well of 6-well plate or 500 µl per plate of 10 cm2 plate). Immediately scrape the cells off the plate and transfer the extract to a microcentrifuge tube. Keep on ice.

5. Sonicate for 10-15 seconds to shear DNA and reduce sample viscosity. 

6. Heat a 20 µl sample to 95-100ºC for 5 minutes; cool on ice.

7. Microcentrifuge for 2-5 minutes.

8. Load 20 µl onto SDS-PAGE gel (10 cm x 10 cm).


Solutions and Reagents:

Quantity 8 ml 3X Blue Loading Buffer and 1 ml 30X Reducing Agent

3X Blue Loading Buffer Pack: 187.5 mM Tris-HCl (pH 6.8 at 25ºC), 6% (w/v) SDS, 30% glycerol and 0.03% (w/v) bromophenol blue. (Store at room temperature.)  

30X Reducing Agent: 1.25 M dithiothreitol (DTT) (Store at -20ºC.)


Storage: Store at Room Temperature and -20°C.3X Blue Loading Buffer Pack: 187.5 mM Tris-HCl (pH 6.8 at 25°C), 6% (w/v) SDS, 30% glycerol and 0.03% (w/v) bromophenol blue. (Store at room temperature.)30X Reducing Agent: 1.25 M dithiothreitol (DTT) (Store at –20°C.)


For Research Use Only. Not For Use In Diagnostic Procedures.
Cell Signaling Technology® is a trademark of Cell Signaling Technology, Inc.