Thermo Scientific™

Pierce™ Silver Stain Kit

Catalog number:  24612

 Related applications:

Protein Gel Electrophoresis

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The Thermo Scientific Pierce Silver Stain Kit is a rapid, ultra-sensitive and versatile silver stain system for protein detection in polyacrylamide gels, yielding consistent and reliable results with many 1D and 2D gel types.

Features of the Pierce Silver Stain Kit:

Sensitive silver stain—detect proteins at 0.25 ng; equal or better sensitivity than monochromatic metallic silver stains from other suppliers
Clear background—method produces intensely-stained protein gels with very low background color, shading or anomalies
Robust performance—reagents and protocol are formulated to yield excellent staining results amidst even wide-ranging differences in user technique
Rapid, flexible protocol—approx. 1.5 hours are required to complete the entire default procedure, but certain steps can be performed overnight or shortened with only minimal effects
Gel-compatible—staining performance is very good with a variety of commercial precast mini-gels and SDS-PAGE buffer-systems
Workflow-compatible—mild chemical formulation ensures compatibility with mass spectrometry, sequencing and other downstream procedures that depend on destaining and protein recovery

The Pierce Silver Stain Kit is a metallic silver (Ag) protein stain that yields a remarkably clear and uniform gel background while delivering consistent, high-sensitivity staining results at each and every use. In standard mini gels, proteins are detectable at greater than 0.25ng per band or spot. The protocol has been optimized for flexibility by allowing short or overnight gel fixation and staining steps without affecting staining performance (sensitivity or clarity). A short (one-minute) sensitization step, performed after gel fixation, yields results that are free of the characteristically dark or blotchy backgrounds often seen with homemade or other commercially available silver stains. This feature is beneficial when performing densitometric analysis of silver stained gels.

Additional Features:
• Gel fixation step can be completed in 30 minutes or overnight
• Gel staining can be performed within 5 min to 20 hrs, depending on desired sensitivity

Careful manufacturing procedures and thorough quality testing ensure that the Pierce Silver Stain Kit yields excellent results with every use, independent of the polyacrylamide gel type or buffer system being used. Most proteins are easily detectable at low nanogram or subnanogram amounts, and background levels are very low (see Additional Information section at the end of these instructions). The protocol clearly indicates how both fixing and staining steps can be extended overnight without compromising performance, a feature that enhances convenience for ordinary workday schedules. Likewise, the default 30-minute staining step can be decreased to 5 minutes, enabling the staining procedure to be completed in less than 20 minutes after gel fixation.

Silver staining methods generally use either glutaraldehyde or formaldehyde, which cause some covalent crosslinking of protein to each other and the gel matrix. To the extent that this crosslinking occurs, extraction or elution of protein from the gel will be inhibited. Pierce Silver Stain uses formaldehyde in the stain and developer working solutions, but the concentration is low enough that irreversible protein crosslinking is minimized. The procedure accompanying the Pierce Silver Stain Kit for Mass Spectrometry (Part No. 24600) uses the same silver stain reagents but is slightly modified to optimize recovery without greatly sacrificing sensitivity.
For Research Use Only. Not for use in diagnostic procedures.


Target Molecule: Protein
Label or Dye: Silver
Detection Method: Colorimetric
Detection Location: In-Gel Detection
Product Line: Pierce™
Product Size: 1 L

Contents & storage

Sufficient For: 20 mini gels (SDS-PAGE)
• Silver Stain Sensitizer, 2 mL
• Silver Stain, 500 mL
• Silver Stain Enhancer, 25 mL
• Silver Stain Developer, 500 mL

Store at room temperature.


Manuals & protocols