Shop All Transfection Reagents

ExpiFectamine™ 293 Transfection Kit (Gibco™)

The ExpiFectamine™ 293 Transfection Kit is a core component of the Expi293™ Expression System. It is designed for transient transfection of high density cultures of HEK (human embryonic kidney) 293 cells. The high-efficiency, cationic, lipid-based transfection reagent and transfection enhancers are designed to power the highest possible level of protein expression from Expi293F™ cells cultured in Expi293™ Expression Medium

Designed specifically for transfection of high density suspension cell culture, with matching transfection enhancers that boost transfection performance and protein expression
Achieves protein yields 2- to 10-fold higher than other transfection reagents used on high density 293 cell cultures
Employs the same transient expression protocols typically used in current low-density 293 suspension culture systems to easily switch from low density systems to the high yield, high density Expi293™ Expression System
Provides robust and reproducible transfection results, giving users greater confidence in their results
Scale transfections for culture volumes of less than 1 mL to greater than 10 liters, while maintaining equivalent volumetric protein yields

The ExpiFectamine™ 293 Transfection Kit is specifically designed to work with Expi293F™ cells in the Expi293™ Expression System. The transfection kit consists of the cationic lipid-based ExpiFectamine™ 293 Reagent and ExpiFectamine™ 293 Transfection Enhancers 1 and 2. The enhancers are added 16 to 18 hours post-transfection to boost transfection, cell viability, and protein expression. The protocol for use of ExpiFectamine™ 293 Transfection components is very similar to transfection protocols for other transient expression reagents, such as 293fectin and FreeStyle™ MAX.

Lipofectin™ Transfection Reagent (Invitrogen™)

Lipofectin® Transfection Reagent is the reagent of choice for transfection of endothelial cells. Lipofectin® Transfection Reagent is also suitable for transfecting DNA, RNA, and oligonucleotides into mammalian cells, and DNA into plant protoplasts. Lipofectin® reagent has also been shown to work well, in combination with PLUS® Reagent, for the transfection of HeLa cells. Lipofectin® Transfection Reagent is a 1:1 (w/w) liposome formulation of the cationic lipid N-[1-(2,3-dioleyloxy)propyl]-n,n,n-trimethylammonium chloride (DOTMA) and dioleoyl phophotidylethanolamine (DOPE) in membrane-filtered water.

TurboFect™ Transfection Reagent (Thermo Scientific™)

Thermo Scientific TurboFect Transfection Reagent is a highly efficient, easy-to-use, non-immunogenic transfection reagent for delivery of DNA plasmids and expression vectors into eukaryotic cells.

Features of TurboFect Transfection Reagent:

• High transfection efficiency of a wide variety of cell types
• No optimization required for most cell lines
• Excellent transfection efficiency in the presence or absence of serum
• Minimal cytotoxicity
• Ready-to-use—no need to reconstitute, dilute or manipulate

Applications of TurboFect Transfection Reagent :
• Stable and transient transfection or co-transfection of DNA or RNA
• Experiments with adherent or suspension cells, differentiated or undifferentiated cells
• Gene expression studies and assays involving GFP or luciferase reporters

TurboFect Transfection Reagent is a sterile solution of a proprietary cationic polymer. TurboFect Reagent interacts with DNA to form small, stable, highly diffusible complexes which are readily endocytosed. The reagent creates a proton-sponge effect that buffers endosomal pH by provoking massive proton accumulation and passive chloride influx. As a result, rapid osmotic swelling of the endocytosed DNA-complex causes it to rupture in the cytosol, allowing translocation of DNA to the nucleus. TurboFect Reagent is ideal for transfection of a variety of cells, including primary and difficult-to-transfect cells.

293fectin™ Transfection Reagent (Gibco™)

293fectin™ Transfection Reagent is a proprietary, cationic lipid-based formulation for transfecting DNA into eukaryotic cells. This reagent is optimized for transfecting suspension 293 human embryonic kidney cells (e.g., FreeStyle™ 293-F cells, Cat. No. R790-07) in defined, serum-free FreeStyle™ 293 Expression Medium (Cat. No. 12338-018), and is intended for use with the FreeStyle™ 293 Expression System (Cat. No. K9000-01). 293fectin™ Transfection Reagent provides the following advantages:

• Demonstrates high transfection efficiency in suspension 293 cells and is also suitable for transfecting adherent 293 cells
• Suspension FreeStyle™ 293-F cells may be transfected in FreeStyle™ 293 Expression Medium; no medium change is required
• Add 293fectin™ reagent complexes directly to cells in culture medium
• No need to remove complexes or change or add medium following transfection

ExpiFectamine™ CHO Transfection Kit (Gibco™)

The ExpiFectamine™ CHO Transfection Kit is a core component of the ExpiCHO™ Expression System Kit (Cat. No. A29133). It is designed for transient transfection of high-density cultures of Chinese hamster ovary (CHO) cells. The high-efficiency, cationic transfection reagent, coupled with an optimized transfection enhancer and culture feed, will power the highest possible level of protein expression from ExpiCHO-S™ Cells (Cat. No. A29127) cultured in ExpiCHO™ Expression Medium (Cat. No. A2910001).

The ExpiFectamine CHO Transfection Kit:
• Achieves greater than 90% transfection efficiency of high-density suspension CHO cell culture, with matching transfection enhancer and culture feed to boost transfection performance and protein expression
• Requires one-third to one-half less plasmid DNA than other transfection reagents while achieving superior expression performance
• Enables options for three transient expression protocols for maximal work flexibility while still fitting into the same overall workflow used by other transient expression systems, such as FreeStyle™ MAX CHO and Expi293™
• Delivers robust and reproducible transfection results, giving you greater confidence in your results
• Demonstrates linear scalability of transfections from culture volumes of <1 mL to >10 L

The ExpiFectamine CHO Transfection Kit is specifically designed to work with ExpiCHO-S Cells in the ExpiCHO™ Expression System Kit. The transfection kit supplies the cationic ExpiFectamine™ CHO Transfection Reagent, ExpiFectamine™ CHO Transfection Enhancer, and ExpiCHO Feed.

TurboFect in vivo Transfection Reagent (Thermo Scientific™)

Thermo Scientific TurboFect in vivo Transfection Reagent is highly effective for DNA plasmid delivery in vivo, while not inducing an inflammatory response. TurboFect in vivo has been assessed for plasmid DNA delivery in both mice and rats and is suitable for DNA administration via various routes, including intravenous, intraperitoneal, and intratumoral injection. The amount of DNA and suggested injection volume will depend on the experimental animal and the route of administration as well as the targeted tissue or organ and the expression vector.

TurboFect in vivo is a sterile solution of a cationic polymer in water. The polymer forms compact, stable, positively charged complexes with DNA. These complexes protect DNA from degradation and facilitate gene delivery in vivo.


• No detectable inflammatory response
• Successful plasmid delivery via multiple routes of administration
• Functionally tested in mice and rats

Lipofectamine™ LTX Reagent with PLUS™ Reagent (Invitrogen™)

Lipofectamine® LTX Reagent is a plasmid transfection reagent that offers the right balance of potency and gentleness for your cells, resulting in the highest possible transfection efficiencies and viabilities. Lipofectamine® LTX Reagent is an advanced solution for gene expression in both common and challenging cell types. No other plasmid DNA-specific transfection reagent can match the efficiency, convenience, and gentleness of Lipofectamine® LTX Reagent for transfection of primary, challenging, and sensitive cell lines. Lipofectamine® LTX Reagent is synthesized from 100% animal origin-free components, making it easy to validate the absence of zoonotic diseases, such as BSE or viruses, in research experiments or cell lines.

Lipofectamine® LTX Reagent offers:

• Superior delivery—transfect a broad range of cell types, including primary, challenging, and sensitive cells, with high efficiency
• Superior performance—combine high transfection efficiency with maximal (>90%) cell viability
• Optimized protocols—rapid, simple protocols provided for most cell lines
• A highly effective reagent to generate stable cell lines

Transfect primary cells efficiently
Primary cells are often difficult to transfect. Lipofectamine® LTX Reagent, when combined with PLUS™ Reagent, provides the highest level of transfection in primary cells of any lipid- or polymer-based reagent. Many primary cell types have been successfully transfected with Lipofectamine® LTX Reagent, including primary neural progenitor cells.

Superior delivery into challenging cells
When it comes to achieving high levels of protein expression in RAW267.3 macrophages, Lipofectamine® LTX Reagent outperforms competing transfection reagents (see figure). Achieving high-level transgene expression in cells that are traditionally refractory to transfection allows you to obtain results that were previously unattainable.

Broad compatibility with cell lines
In addition to being excellent for transfecting primary and challenging cells, Lipofectamine® LTX Reagent provides you with the most versatile approach to transfecting established cells lines, including those that are sensitive to other transfection reagents. Use our Transfection Selection Tool to help you select the best transfection conditions for the cells with which you work.

Stable transfection
Lipofectamine® LTX strikes the right balance between potency and gentleness, giving you the highest possible percentage of successfully transfected cells. This makes Lipofectamine® LTX Reagent the quickest and easiest reagent for establishing stable transfectants from challenging or refractory cell types.

Simple, rapid, serum-compatible protocol
Lipofectamine® LTX Reagent offers a streamlined protocol—no need to remove transfection complexes or change/add medium following transfection. A simple optimization protocol helps you get the best results quickly, so you'll spend less hands-on time, and get faster results.

Invivofectamine™ 3.0 Reagent (Invitrogen™)

Invivofectamine® 3.0 Reagent is an animal origin-free lipid nanoparticle designed for high efficiency in vivo delivery of siRNA and miRNA to mouse liver cells following tail vein injection.

Using Invivofectamine® 3.0 Reagent
Invivofectamine® 3.0 Reagent is ideally suited for in vivo delivery of siRNA and miRNA duplexes. Invivofectamine® 3.0/RNA complexes are delivered using a low-volume, low-pressure method with no toxicity and no stress response in the animal. Invivofectamine® 3.0 can also be combined with BLOCK-iT™ fluorescent controls to track the biodistribution of the siRNA or miRNA.

PLUS™ Reagent (Invitrogen™)

PLUS™ Reagent is used in conjunction with various transfection reagents, such as Lipofectamine™ Reagent, to improve transfection efficiency in adherent cell lines.

Using PLUS™ Reagent
Some customers find that when using PLUS™ Reagent, less optimization of DNA concentration is needed to achieve high transfection performance. The addition of PLUS™ Reagent may also reduce the quantities of DNA and lipid required by approximately one-half compared to lipid alone. PLUS™ Reagent was specifically designed to expand the array of transfectable cell types. When used with Lipofectamine™ Reagent, PLUS™ Reagent has been demonstrated to improve the transfection of BHK-21, NIH 3T3, and other cell lines.

Lipofectamine™ CRISPRMAX™ Cas9 Transfection Reagent (Invitrogen™)

Lipofectamine CRISPRMAX Cas9 Transfection Reagent is the first optimized lipid nanoparticle transfection reagent for CRISPR-Cas9 protein delivery. It is a high-throughput-friendly, cost-effective alternative to electroporation.

Working together with our TrueCut Cas9 Protein v2 and TrueGuide Synthetic gRNA, it provides:
• Demonstrated cleavage efficiency—tested in over 20 cell types including iPSC, mESC, N2A, CHO, A549, HCT116, HeLa, HEK293, and several others
• Low cell toxicity—less cells needed to initiate your experiment
• High throughput friendly—an ideal delivery solution for 96-well format
• Cost savings—whether cost-per-reaction or initial investment

Achieve high transfection efficiency in novel genome editing applications
Lipofectamine CRISPRMAX transfection reagent increases the likelihood of successful cleavage and recombination, especially when combined with our TrueCut Cas9 Protein v2 and TrueGuide Synthetic gRNA. This ultimately maximizes the efficiency of performing genetic modifications.

Improve experimental outcomes using TrueCut Cas9 Protein v2
Unlike CRISPR plasmid or Cas9 mRNA, using Cas9 protein provides superior cleavage efficiency in primary cells and stem cells. It eliminates the need for transcription or translation of the payload, removes the risk of genomic integration, and is cell cycle independent.

Calcium Phosphate Transfection Kit (Invitrogen™)

The Calcium Phosphate Transfection Kit provides high-quality reagents to enable the introduction of DNA into eukaryotic cells via calcium phosphate co-precipitation.

How it works
The calcium phosphate transfection method for introducing DNA into mammalian cells is based on forming a calcium phosphate-DNA precipitate. Calcium phosphate facilitates the binding of the DNA to the cell surface. DNA then enters the cell by endocytosis. The method was first developed by Graham and van der Ebb and was later modified by Wigler. The procedure is routinely used to transfect a wide variety of cell types for transient expression or for producing stable transformants. The DNA is mixed directly with a concentrated solution of CaCl2, which is then added dropwise to a phosphate buffer to form a fine precipitate. Aeration of the phosphate buffer while adding the DNA-CaCl2 solution helps to ensure that the precipitate that forms is as fine as possible, which is important because clumped DNA will not adhere to or enter the cell as efficiently.

Lipofectamine™ RNAiMAX Transfection Reagent (Invitrogen™)

Lipofectamine® RNAiMAX Transfection Reagent provides the highest transfection efficiencies on the widest variety of cell types for siRNA-mediated gene knockdown experiments. Lipofectamine® RNAiMAX is a proprietary RNAi-specific cationic lipid formulation designed specifically for the delivery of siRNA and miRNA into all cell types.

With Lipofectamine® RNAiMAX Transfection Reagent you will get:

• Superior transfection efficiency requiring lower RNAi concentrations, leading to more effective gene knockdown with minimal nonspecific effects
• Easy optimization due to minimal cytotoxicity across a 10-fold concentration range of transfection reagent
• Superior transfection efficiencies for miRNA antagonists and mimics
• Compatibility with a broad range of cell types, providing the most versatile approach to all of your gene silencing experiments
• A simple and rapid protocol for consistent and reproducible results

High knockdown in a wide range of cells
Lipofectamine® RNAiMAX Transfection Reagent transfects a wide range of cell types (see figure). For gene silencing, Lipofectamine® RNAiMAX Transfection Reagent's high-efficiency transfections lead to the high levels of gene knockdown needed to achieve convincing results.

Simple, high-throughput–ready transfections
Simply mix Lipofectamine® RNAiMAX Transfection Reagent with siRNA, add to your cells, incubate, and measure gene knockdown. The simplicity and speed combined with high transfection efficiency make Lipofectamine® RNAiMAX Transfection Reagent ideal for high-throughput siRNA transfections. Transfection conditions can be easily established for automated or robotic systems used in such applications.

Find an optimized Lipofectamine® RNAiMAX transfection protocol for your cell line.

Lipofectamine™ Transfection Reagent (Invitrogen™)

Lipofectamine® Transfection Reagent is one of our first-generation, cationic-lipid transfection reagents formulated for the transfection of DNA into eukaryotic cells. Lipofectamine® Transfection Reagent is a trusted, value reagent with many years of cited use in thousands of publications and with many cell lines.

With Lipofectamine® Transfection Reagent, you'll get:

• A reagent proven to work in high-throughput applications
• A reliable reagent for establishing stable cell lines
• A reagent that works well with PLUS™ Reagent for higher protein expression

A proven technology
Our Lipofectamine®-brand reagents have been recognized as the most-cited transfection reagent family, with tens of thousands of citations since launch in 1993. Lipofectamine® Transfection Reagent is no exception as a trusted reagent for a wide range of cell lines. When used in combination with PLUS™ Reagent, Lipofectamine® Transfection Reagent has been shown to work well with cells such as BHK-21, NIH 3T3, COS-1, fibroblasts, keratinocytes, HT-29, MRC-5, and SK-BR3.

A "value" alternative for plasmid DNA
With such a legacy comes a commitment to providing the best reagents for all scientists and labs, regardless of their funding capabilities. Lipofectamine® Transfection Reagent is a value alternative for transfection of plasmid DNA into eukaryotic cells with a simplified protocol. For optimal results in a wider range of plasmid DNA transfection conditions, we recommend Lipofectamine® LTX Reagent, due to its optimal balance of potency & low-cytotoxicity. Lipofectamine® 2000 Transfection Reagent is recommended if you are transfecting a broad range of cell lines or want to transfect RNA.

siPORT™ Amine Transfection Agent (Invitrogen™)

A polyamine-based Ambion® siRNA transfection agent that can be used to transfect cells during subculturing-—saving a full day of valuable time—without increasing toxicity. It is supplied in one tube containing 0.4 mL. A successful siRNA experiment requires the appropriate transfection agent for your cells, and one that is optimized for siRNA delivery. The efficiency with which different transfection reagents deliver nucleic acids can vary dramatically with the type of nucleic acid being transfected (RNA vs. DNA, single-stranded vs. double-stranded) and the cells being used.

Accessory Products:
siPORT™ NeoFX™ Transfection Agent (SKU#s AM4511 and AM4510), a cationic and neutral lipid mixture, is also available. For testing which transfection agent is best with your system, the Silencer® siRNA Transfection II Kit (SKU# AM1631) is recommended. It contains the two different transfection agents along with controls for transfection optimization.

Lipofectamine™ 3000 Transfection Reagent (Invitrogen™)

Lipofectamine® 3000 Transfection Reagent leverages our most advanced lipid nanoparticle technology to provide superior transfection performance with improved application outcomes and reproducible results. This reagent delivers superior transfection efficiency and improved cell viability for the widest range of hard-to-transfect and common cells (e.g., HEK293, HeLa).

Successfully transfect the widest variety of biologically relevant cell types with a reagent that offers:

• Superior performance—our highest efficiency reagent for difficult-to-transfect cells
• Improved cell viability—gentle on your cells, with low toxicity
• Versatile—one reagent for DNA, RNA, and co-transfection

Efficiently Transfect Difficult-to-Transfect Cells
Lipofectamine® 3000 reagent is designed to efficiently transfect difficult-to-transfect cells, yielding superior transfection performance across the broadest array of cell types. Successfully transfected cell types include:

Fibroblast (3T3, COS-7)Myoblast (C2C12, L6 CRL-1458)
Hepatocyte (HepG2, HuH7)Erythroleukemic cell (K562)
Breast carcinoma (MCF7, Hs578T)Prostate carcinoma (LNCap)
Lung carcinoma (A549, NCI-H460)Osteosarcoma (U-2 OS, Saos-2)
Colon carcinoma (Caco2, SW480)Pancreatic carcinoma (PANC-1)
Skin melanoma (SK-MEL-28) 

View performance data for 60+ cell lines plus comparison to Lipofectamine 2000 >

Transfect Common Cells Efficiently and Cost-Effectively
For common cell types, Lipofectamine® 3000 reagent is more cost-effective than other reagents due to its high concentration and low usage amount. The 1.5 mL size provides up to 1500 transfection reactions (in 24-well plates).

Achieve Superior Transfection Efficiency While Maintaining Low Toxicity
Lipofectamine® 3000 reagent maintains a high transfection efficiency within a robust dynamic range of lipid doses for quick and easy optimization. A low toxicity lipid dose (0.75 µL for 24-well plates) is suggested for applications requiring minimal disruption of the cells.

Enable High Transfection Efficiency in Novel Genome Editing Applications
Lipofectamine® 3000 reagent is suitable for novel genome editing applications. It increases the likelihood of successful cleavage and recombination with TALENs or CRISPRs through highly efficient transfection, ultimately maximizing the efficiency of genetic modifications and simplifying the downstream processes.