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All Invitrogen precast protein gels are high-quality polyacrylamide gels designed to deliver excellent performance, reliability, and reproducibility. Our protein gels are offered in four different chemistries. Whether your protein is 2.5 kDa or as large as 500 kDa, or you’re looking for separation under native conditions or by isoelectric point—we have a solution for your application.
Choose Bis-Tris gel chemistry when you have a low abundance protein or when your downstream applications require high protein integrity, such as post-translational modification analysis, mass spectrometry, or sequencing. Bis-Tris chemistry provides a neutral (pH 7.0) environment during electrophoresis, which helps reduce protein modifications and produces sharp band resolution.
Novex Tris-Glycine gel chemistry offers maximum protein separation performance and crisp, straight bands.
For separation of high molecular weight proteins, Tris-acetate gel chemistry is recommended, offered in NuPAGE Tris-Acetate gels.
For separation of low molecular weight proteins, use Novex Tricine gels which provide increased resolution of proteins with molecular weights as low as 2.5 kDa.
![]() Bis-Tris Gels | ![]() Tris-Glycine Gels | ![]() Tris-Acetate Gels | ![]() Tricine Gels | |
Available precast gels | NuPAGE Bis-Tris Gels, Bolt Bis-Tris Plus Gels | Novex Tris-Glycine | NuPAGE Tris-Acetate | Novex Tricine |
Use for | Neutral pH environment helps prevent protein degradation Faster run times Dilute samples, low abundance proteins | Traditional Laemmli-style gel electrophoresis | Improved resolution of high molecular weight proteins | Improved resolution of low molecular weight proteins |
Protein sample type | Broad range MW (6–400 kDa) | Broad range MW (6–400 kDa) | High range MW (40–500 kDa) | Low range MW (2.5–40 kDa) |
WedgeWell format gels | Midi and mini (load up to 100 and 60 µL, respectively) | Midi and mini (load up to 100 and 60 µL, respectively) | Midi and mini (load up to 100 and 60 µL, respectively) | - |
Average run time | 22–45 min Bolt gels 35–50 min NuPAGE | 90 min | 60 min | 90 min |
Shelf life* | Up to 16 months at room temperature | Up to 12 months | Up to 8 months | 1–2 months |
Get started with our money-saving Protein Gel Welcome Packs
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WedgeWell format wells are wedge-shaped wells that increase the sample loading capacity, allowing up to 100 µL of sample to be loaded in the well. The WedgeWell design was introduced in 2012 to increase the sample loading capacity of Invitrogen precast mini gels.
More than a thousand peer-reviewed articles demonstrate how WedgeWell format gels help produce publication-quality results and enable the study of low abundance proteins, reducing the need to enrich dilute samples before loading them onto the gel.
Midi gels with WedgeWell format wells allow the separation of up to 26 protein samples in the same run without compromising on sample loading volume.
Key benefits of WedgeWell format gels:
Available in three different gel chemistries:
All Invitrogen protein gels meet the highest standards of performance, reliability, and consistency.
See our Protein Gel Performance Guarantee
*Based on comparison between our most popular mini and midi well format options (12 and 20 well, respectively)
Well size | Recommended loading volume (µL) | Maximum loading volume (µL) |
---|---|---|
WedgeWell format midi gels | ||
12 + 2 (large well) | 90 | 100 |
12 + 2 (small well) | 30 | 35 |
20 | 50 | 60 |
26 | 30 | 40 |
WedgeWell format mini gels | ||
10 | 40 | 60 |
12 | 30 | 45 |
15 | 20 | 35 |
17 | 15 | 30 |
Midi gels | ||
12 + 2 (large well) | 45 | 60 |
12 + 2 (small well) | 15 | 20 |
20 | 25 | 30 |
26 | 15 | 20 |
Mini gels* | ||
9 | 17 | 28 |
10 | 15 | 25 |
12 | 12 | 20 |
15 | 9 | 15 |
17 | 9 | 15 |
*1 mm thick gel
For separation of proteins under nondenaturing conditions or native page, three gel systems are recommended- NativePAGE Bis-Tris, Novex Tris-Glycine and NuPAGE Tris-Acetate. NativePAGE Bis-Tris gels, are based on the blue native polyacrylamide gel electrophoresis (BN-PAGE) which helps overcome the limitations of traditional native electrophoresis by providing a near-neutral operating pH and detergent compatibility. Both Novex Tris-Glycine and NuPAGE Tris-Acetate gels can be run under native and non-reducing conditions for separation of proteins by net charge, size and shape.
For separation of proteins by isoelectroctric point (pI), use Novex IEF gels. Novex IEF gels effectively create a pH gradient to separate proteins according to their unique pI.
![]() NativePAGE Bis-Tris Gels | ![]() Isoelectric Focusing Gels | ![]() Novex Zymogram Gels | ![]() E-PAGE Precast Gels | |
Gel chemistry | Bis-Tris | pH 3–7, pH 3–10 | Tris-glycine with gelatin | 8% or 6% |
Protein sample type | 15–10,000 kDa | pI 3.5–8.5 | 10–220 kDa | 10–200 kDa |
Product benefits | Separation of native proteins, neutral pH for high sensitivity applications | Separation of proteins based on isoelectric point | Separation of proteins based on size and activity | High-throughput gel system, that eliminates the need for buffers |
![]() SureCast Handcast System | ![]() Empty Gel Cassettes | ![]() Bolt Empty Cassettes | |
Cassette type | Reusable, glass | Single use, pre-sealed | Single use, pre-sealed |
Product benefits |
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Gel dimensions | Mini: 8x8 cm (1 mm thick) | Mini: 8x8 cm (1 or 1.5 mm thick) Midi: 8x13 cm (1 mm thick) | Mini: 8x8 cm (1 mm thick) |
Gel tank | Mini Gel Tank, Xcell SureLock Mini-Cell | Mini Gels: Mini Gel Tank or XCell SureLock Mini-Cell Midi Gels: XCell4 SureLock Midi-Cell or Bio-Rad Criterion (with adapters only) | Mini Gel Tank, Xcell SureLock Mini-Cell |
Reagents | SureCast reagents, other popular polyacrylamide reagents | SureCast reagents, other popular polyacrylamide reagents | SureCast reagents, other popular polyacrylamide reagents |
Combos available | 1-, 2-, 10-, 12-, and 15-wells | 1-, 2-, 5-, 10-, 12-, 15-, and 2D-wells | 10- or 12-wells (high capacity wells) |
This webinar will highlight the different protein modifications occurring during electrophoresis, the importance of pH in sample integrity, how to choose the right gel chemistry for specific research applications, and how to introduce the right gel chemistry in your research workflow.
This video will show you how to separate proteins by using Invitrogen Mini Gel Tank and Invitrogen precast SDS-PAGE gels.
Find an excellent mini or midi gel for your protein electrophoresis experiment.
Find an exceptional Invitrogen mini or midi gel to replace your current precast gel from another supplier.
Download the Protein Gel Guide for a printable gel migration chart.
Pour your own gels with a handcast system | Value gels for screening and qualitative protein separation | Gels based on traditional Laemmli formula with 60uL sample volume capacity | Highest resolution, longest shelf-life and western optimized gels | Highest resolution and long shelf-life | |
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View all | Order now | Order now | Order now | Order now | |
![]() View all handcast systems | ![]() Novex™ Value Tris-Glycine gels | ![]() Novex™ WedgeWell™ Tris-Glycine gels | ![]() Bolt™ Gels | ![]() NuPAGE™ Gels | |
Citations in the last 10 years | N/A | N/A | N/A | N/A (new product) | >20,000 |
Protein resolution & integrity, lot consistency & band quality | Not applicable | Good | High | High | High |
Average run time | 90 min | 46 min (225V) | 60 min | 35 min | 35 min |
Well format | Standard | Standard | New high-capacity wedge design | New high-capacity wedge design | Standard |
Gel dimensions | Mini: 8x8 cm, 1 or 1.5 mm thick | Mini: 8x8 cm, 1 mm thick | Mini: 8x8 cm, 1 or 1.5 mm thick | Mini: 8x8.3 cm, 1 mm thick | Mini: 8x8 cm, 1 or 1.5 mm thick Midi: 8 x 13 cm, 1 mm thick |
Shelf life | N/A | Up to 12 months | Up to 12 months | >16 months | 8 months (Tris-Acetate) 16 months (Bis-Tris) |
Pack sizes | N/A | 20 pack | 2 & 10 packs | 10 packs | 2 & 10 packs |
For Research Use Only. Not for use in diagnostic procedures.