Super Electroporator NEPA21 Type III Transfection System

Precision electroporation for demanding cells, tissues, and organisms
The NEPA21 Type III Super Electroporator builds on the proven NEPA21 platform with expanded performance and usability for modern research techniques. Designed for researchers who need reproducible delivery of nucleic acids and proteins into difficult cell types, the NEPA21 Type III combines flexible pulse control with multiple electrical modes in a system that remains practical at the bench.

At the core of the platform is NEPA Gene’s non-capacitor-based pulsing technology, which enables stable square-wave delivery at relatively low voltages. This approach allows researchers to fine-tune electroporation conditions while minimizing unnecessary stress on cells.

Whether working with mammalian cells, primary cells, embryos, microorganisms, or other challenging samples, the NEPA21 Type III provides the control needed to confidently optimize transfection conditions.

What makes the NEPA21 Type III unique?
The NEPA21 Type III is built around one central idea: give researchers full control over electroporation conditions without forcing them into a fixed or “black box” experiment.

Its advanced pulse programming allows poring and transfer pulses to be set independently, making it easier to match electrical conditions to both the sample type and the molecular payload. This 4-phase control is particularly valuable when working with sensitive or difficult-to-transfect cells, where small changes in pulse conditions can significantly impact results.

At the same time, the system remains straightforward to use. Clearly defined parameters and an intuitive interface reduce guesswork during setup, while still allowing complete flexibility for method development or re-optimization.

The NEPA21 platform has long been associated with challenging applications, and the Type III extends that capability even further—supporting workflows across mammalian cultured cells, primary cells, stem cells, embryos, microorganisms, and genome editing applications including plasmid DNA, mRNA, and CRISPR-related delivery.

How we made the NEPA21 better
Since its introduction, the NEPA21 Electro-Kinetic Transfection System has become a widely adopted platform for high-value electroporation experiments. Its open programming approach places pulse optimization directly in the hands of the researcher, rather than relying on fixed or pre-defined conditions.

Another key advantage has been its flexibility in buffer selection. In many cases, cells can be electroporated in standard culture media, reducing dependence on specialized proprietary reagents and simplifying workflow integration.

Now, more than 15 years later, the NEPA21 Type III expands on that foundation with a broader range of electrical capabilities and improved usability. Key updates include:

• Expanded voltage range (up to 500 V)
• Additional operating modes, including constant current and constant power
• Set defined electrical ranges for each experimental type
• Integrated impedance measurement (pre-pulse checks)
• Enhanced data handling and program storage
• A modern touchscreen interface for simplified programming and real-time feedback

The comparison chart below highlights the key differences between the NEPA21 Type III and earlier NEPA21 systems.

In vitro transfection of suspension, adherent, and primary cells
The NEPA21 Type III supports both suspension and adherent cell workflows using two primary electrode formats. Bulldog’s electroporation cuvettes provide a simple and cost-effective option for suspension cells, often without the need for specialized buffers.

For adherent cells, dedicated plate electrodes enable electro-kinetic delivery directly within culture plates, allowing transfection without disrupting cell attachment.

The NEPA pulsing approach has been shown to facilitate transport not only across the plasma membrane, but also toward the nuclear compartment—supporting efficient delivery of DNA and RNA in demanding cell types such as primary cells, stem cells, ES cells, and iPSCs.

Making transgenic workflows easier
The NEPA21 platform has played a role in the early development of both the TAKE and iGONAD methods, which offer an alternative to traditional microinjection-based transgenesis.

These approaches reduce the need for labor-intensive manipulation of individual fertilized oocytes by enabling direct delivery of gene editing reagents via electroporation. In the case of iGONAD, this can be performed in situ within the oviduct, eliminating the need for embryo isolation and transfer.

With hundreds of systems in use across transgenic research labs, the NEPA21 family—including the NEPA21, NEPA21 Vivo, and NEPA21 Type III—provides a flexible platform for supporting these workflows in model organisms such as mice and rats.

Specialized electrodes are available for both isolated one-cell zygotes and for in vivo electroporation within the oviductal ampulla. These approaches enable simultaneous delivery of CRISPR-Cas9 and related reagents into multiple zygotes, helping to streamline the generation of transgenic animals.

In vivo transfection in mice and rats
The NEPA21 Type III is compatible with a wide range of specialized electrodes designed for in vivo electroporation. These tools enable delivery of nucleic acids directly into tissues, expanding the range of experiments that can be performed in live animal models.

Applications have been reported across multiple tissue types, including muscle, skin, liver, kidney, brain, retina, cornea, and reproductive organs. This flexibility allows researchers to explore gene function and expression in physiologically relevant environments.

For researchers working with isolated tissues, the system also supports ex vivo electroporation of samples such as brain tissue, cochlea, and organoids.

In utero, ex utero, and in ovo transfections for developmental studies
NEPA Gene has developed a range of tools and protocols for electroporation of embryonic tissues and whole embryos in model systems such as mice, rats, and chickens.

These approaches allow targeted delivery to specific regions—for example, defined areas of the embryonic brain—or broader applications across developing tissues. The flexibility of the platform has also led to adoption in additional model organisms, including Xenopus and certain invertebrate and plant systems.

Contact us to discuss available electrode configurations and protocols for your specific application.

Additional Information