mPAGE®Lux Casting System for SDS-PAGE Gels (2025)

mPAGE^®Lux Casting System Features and Benefits

mPAGE^®Lux Casting System replaces your gel casting process with faster, simpler, and safer methods with more reproducible results. Cure a mini gel in 90 seconds with the mPAGE^®Lux Casting System compared to conventional methods that take more than 90 minutes. Our quick casting workflow with UV irradiation expedites curing of mPAGE^®Lux Bis-Tris reagents while Bis-Tris gel chemistry allows for shorter run times compared to conventional methods.

The one-step photopolymerization using precise system controls along with less preparation steps means there are fewer chances for error. Our mPAGE^® Caster prevents leakage and the use of Bis-Tris gels provides superior band quality compared to hand-cast Tris-Glycine gels. Additionally, the mPAGE^® Lux Reagent Kit, mPAGE^® TurboMix Reagent Kit, and mPAGE^® precast gels all use Bis-Tris chemistry and share the same running buffers and gel stains. Our mPAGE^® Lux Casting System does not use APS or TEMED and offers a safer option using fewer toxic chemicals.

Traditional Hand Cast Workflow

mPAGE^®Lux Workflow

What are the steps of gel casting?

Casting an SDS-PAGE gel often includes weighing, premixing gel solutions, casting, and wait time for polymerization. While often cited as a more economical solution, conventional hand-cast gel methods are time consuming, requiring many hands-on steps which may result in inconsistent gel formulations. The quality of hand-cast gels and the data they may help generate rely on formulation consistency so that precious reagents and time are ultimately not wasted with gel failures.

The mPAGE^® Lux Casting System offers an innovative solution to your gel casting process. You no longer must choose either saving time or resources. Our novel gel casting system allows researchers to easily cast their gels quickly when they need them, at a fraction of the cost of precast gel technologies. Improve your lab efficiency and upgrade your gel electrophoresis workflow with the mPAGE^® Lux Casting System.

Figure 5:Reproducibility of mPAGE^®Lux Bis-Tris gels.A.Four 8% gels were cast and run with titration of A341 human cell lysate subsequently stained with ReadyBlue™ Coomassie gel stain.B.The relative migration distance (Rf) for the unstained molecular weight marker was calculated for each gel. Standard deviation is shown for each protein band.

mPAGE^® Lux Casting System and Bis-Tris Reagent Kits

Add mPAGE^®Lux Casting System to your lab and have ready-to-use gels in under 3 minutes. Take a breath and get used to a fast gel casting process with less waste and without the worry of failure. That’s fresh. Our mPAGE^® Lux Casting System Kits consist of the mPAGE^® Lux Curing Station, mPAGE^® Lux Mixing Tube, mPAGE^® Gel Caster, mPAGE^® Comb with 10 wells and 15 wells, mPAGE^® Mini Spacer Plate, mPAGE^® Lux Masked Short Plates with 10 wells and 15 wells. For the 0.75 mm thickness mPAGE^® Lux Casting system, the 15 well comb and masked short plates are not included.Kit descriptions and configurations follow:

The mPAGE^®Lux Bis-Tris Reagent Kit is a dedicated reagent kit for the mPAGE^®Lux Casting System. The mPAGE^®Lux Bis-Tris Reagent Kit consists of 3 components, Resolving Solution, Diluent, and Stacking Solution. The kit supports a variety of acrylamide gels between 8.0-13.5%.mPAGE^® Lux Reagent Kit description and configuration follows:

mPAGE^® Lux SDS-PAGE Gel Cast Protocol

All solutions must be protected from sunlight to prevent polymerization. Before casting gels, bring all solutions to room temperature.

Resolving Gel

1. Prepare Resolving Gel solution by mixing Resolving Solution and Diluent. See the table below for mixing volumes. Resolving gel solution may be prepared in a large batch to make several gels sequentially.
2. Using a clean pipette, add Resolving Solution to a black mixing tube or other opaque container.
3. Using a clean pipette, add Diluent to the same mixing tube.
4. Mix by gently turning container end over end. Do not vortex.

Resolving Gel Solution Volumes

Use the below volumes to make a single 1.0 mm gel. For 0.75 mm and 1.5 mm solution volumes, see the full user guide available on the product page at SigmaAldrich.com.

Stacking Gel

The Stacking Solution is ready to use directly from the bottle. Use 1.5 mL Stacking Solution for a 1.0 mm gel. Important: Do not dilute Stacking Solution.

Gel Casting

1. Clean glass plates with mild detergent and rinse with DI water. Wipe with 70% Ethanol before use.
2. Assemble mPAGE^® Gel Caster using mPAGE^® Spacer Plate and mPAGE^® Lux Masked Short Plate to form glass cassette. The masked short plate should be oriented with the text on the left side of the cassette. Ensure that both glass plates are aligned at the bottom of the caster frame before closing caster clamps. Note: The mPAGE^® Lux Masked Short Plate must be used with the mPAGE^® Curing Station.
3. Power on mPAGE^® Lux Curing Station by pressing the power button. The Curing Station will initiate a self-test. After self-test is complete, the ready screen will appear.
4. Open door and place gel caster into Curing Station, aligning caster behind the bumpers.
5. Using a clean 5 mL pipette, add prepared Resolving Gel Solution to the indicated fill line on the mPAGE^® Gel Caster frame.
6. Using a clean 5 mL pipette, slowly add Stacking Solution up to the top of the short plate.
7. Slowly insert the mPAGE^® comb at an angle to prevent air bubble formation under teeth. Important: Mixing different well formats may result in improper well formation. Use:
   • 10-well combs with 10-well mPAGE^® Lux Masked Short Plates
   • 15-well combs with 15-well mPAGE^® Lux Masked Short Plates
8. Wipe solution spill-over from front of short plate to prevent incomplete curing where spill-over exists.
9. Close Curing Station door and select gel thickness.
10. Press Start to begin gel curing. Tip: If casting multiple gels, begin the Gel Casting process with second Gel Caster now, while the first gel is curing.
11. After curing is complete, open door and remove Gel Caster. Remove cassette from Gel Caster by lowering the tension clip to release the caster frame. Then open the sides of the frame and slide cassette out from top.
12. Use gel immediately or wrap the cassette in wet paper towel and store lying flat in a zip top bag or other airtight container at 2-8 °C for up to 2 weeks. Do not leave cassettes unwrapped as the gel will dry out.

mPAGE^® Lux Bis-Tris Gels with MOPS and MES Running Buffers

mPAGE^® Lux Bis-Tris Gels are designed to work exclusively with MOPS or MES running buffer. Depending on which running buffer is used, very distinct separation patterns can be achieved. MOPS buffer can be used to fine-tune the separation of large and medium-sized proteins, whereas MES buffer provides optimal separation of smaller proteins. Refer to the migration charts (Figure 8) to determine which gel running buffer system is best suited for the intended separation range.

How To Remove Gel After Electrophoresis

Remove the gel from glass cassette using a gel scraper. Cut along gel edges (right) to avoid gel tearing. mPAGE^®Lux Bis-Tris gels should ONLY be used with MOPS-SDS or MES-SDS running buffer. Bis-Tris gels are NOT compatible with Tris-Glycine running buffer.

Sustainable gel casting withmPAGE^®LuxGel Casting System

To quantify the sustainable impacts made by our mPAGE^®Lux Casting System, calculations were performed against the use of a representative fast cast kit for hand-casting polyacrylamide gels for protein electrophoresis. Both systems require the use of reusable casting kits and hand-casting reagent kits. The mPAGE^®Lux Casting System additionally requires the use of the mPAGE^®Lux Gel Curing Station while the baseline system requires the use of APS & TEMED, which are sold separately from the hand-casting reagent kit.

All components required for casting electrophoresis gels over the minimum service lifetime of the mPAGE^®Lux Curing Station, which is 5 years are considered in this evaluation. This includes the production, packaging, distribution, use and end-of-life impacts of the handcasting kit, the necessary reagents and all consumable labware required. Calculations were performed assuming 250, 500 or 1000 gels produced per year and the minimum difference over the baseline system was claimed.

Material and Product Sustainability Attributes

While being an innovative workflow solution for hand-casting polyacrylamide gels, the mPAGE^®Lux Casting System still requires some use of plastic consumables and hazardous reagents. While no suitable replacement for acrylamide exists in this application, all remaining chemical hazards were eliminated from this system and the amount of plastic consumables required is significantly reduced over the baseline system.

The additional mass of the Gel Curing Station required by the mPAGE^®Lux Casting System is offset by the reduction in products required in the gel casting workflow, as shown on the graph. Throughout the lifetime of the instrument, total system mass is reduced by at least 20 % compared to fast cast systems.

Lifetime system mass (kg) for casting 500 gels/year:

Additionally, this product adheres to the principles of SMASH Packaging, our strategy that drives packaging sustainability improvements through less packaging, more sustainable materials, and easier recycling.

• Packaging for products and additional items required for a functional unit are reduced by 30% over the baseline system.
• 100% of system fiber-based packaging have sustainable forestry certification.
• All protective foam inserts made from 100% recycled polyethylene.
• Packaging does not contain any materials which would inhibit recycling as defined by our SMASH guidelines.

mPAGE^® Lux Casting System Distribution and Product Use

The reduction of required consumables and the elimination of certain reagents results in a significant decrease in impacts associated with shipping. The mass reduction in regularly shipped components and associated packaging is at least 24% over the minimum service lifetime of the instrument.

While the added instrument does require energy during operation, the mPAGE^® Lux Casting Station was designed with energy efficiency in mind. By utilizing LED Lighting and a simple yet intuitive user interface, the overall energy consumption remains remarkably low. The cumulative energy consumption required to cure 1000 gels is only 1.65 kWh, equivalent to approximately 33 hours of laptop use. The amount of single-use plastic waste generated throughout the gel casting workflow is reduced by at least 25%. Additionally, mPAGE^® Lux reagents will self-polymerize under exposure to ambient lighting, eliminating unpolymerized acrylamide residue in waste streams.

By casting fresh, ready-to-use gels as needed, the risk of pre-preparing gels which will go unused is eliminated. The mPAGE^® Lux System removes the need to stock reagent kits or pre-cast gels in different percentages, which reduces the amount of waste generated due to component expiration. The mPAGE^® Lux Curing Station is electronic equipment, and as such must be disposed of in compliance with all applicable regulations. For more information on disposal of electronic waste, visit our WEEE Compliance page.

This product has demonstrated significant improvements over the baseline system throughout the entire product life cycle and has been designated as a Greener Alternative Product. For more information, visit our page on our Design for Sustainability framework and our Greener Alternative Products.