ProteanFect™
TuffCell Transfection Kit
Your solution for hard-to-transfect cells
A non-viral, non-liposomal, coacervate-based nucleic acid delivery platform based on mammalian endogenous protein, offering novel solution for efficient gene delivery.
Transfection Efficiency
Cytotoxicity
Payload Capacity
Protocol
Case Studies
Key Performance Highlights of TT300007 in Jurkat T Cells
Key Performance Highlights of TT300007 in Human Primary T Cells
Key Performance Highlights of TT300007 in NK Cells
Key Performance Highlights of TT300007 in Human Primary T Cells
Key Performance Highlights of TT300007 in CD34+ Hematopoietic Stem Cells
Key Performance Highlights of TT300007 in Jurkat T cells
Key Performance Highlights of TT300007 in K562 Cells
Key Performance Highlights of TT300007 in Jurkat T Cells
Key Performance Highlights of TT300008 in Mouse Primary T Cells
Key Performance Highlights of TT300008 in Mouse Primary NK Cells
Key Performance Highlights of TT300008 in Mouse Primary T Cells
A coacervate is a type of droplet-like structure formed when charged polymers (such as proteins, peptides, or nucleic acids) spontaneously separate from solution into a dense, liquid-rich phase, surrounded by a more dilute outer phase. This phenomenon is called liquid-liquid phase separation (LLPS).

What is ProteanFect?
A groundbreaking nucleic acid delivery system that leverages coacervate technology to achieve efficient gene delivery through non-viral, non-electroporation, and non-liposomal approaches.
How ProteanFect Works
ProteanFect forms nanoparticles that rapidly deliver gene cargo into cells, enabling efficient gene expression and safe degradation after delivery.
Why Choose ProteanFect™ TuffCell?
Revolutionary coacervate-based delivery platform offering unprecedented efficiency and safety for hard-to-transfect cells.
Novel Technology
Solution for Hard-to-Transfect Cells
Unlock the full potential of your research with reliable gene delivery into the hardest cells — from T cells and NK cells to neurons and stem cells. ProteanFect™ delivers where lipids fail and electroporation harms.
Primary Cells
Gentle Transfection on Cells
Preserve cell health and function with a protein-based system that minimizes toxicity, stress, and membrane disruption — ensuring your immune cells kill, your neurons fire, and your stem cells differentiate as nature intended.
High Efficiency
Versatility of Cargo Type
From mRNA and siRNA to large plasmids and multiplex CRISPR components, ProteanFect™ flexibly delivers a broad range of nucleic acids — giving you one solution for every experiment.
Now Expanded for CRISPR Genome Editing
Introducing ProteanFect™ CRISPR RNP Transfection Kit — the newest addition to the ProteanFect family, purpose-built for efficient, non-viral delivery of CRISPR/Cas RNP into hard-to-transfect cells.
Optimized for CRISPR Delivery
As CRISPR workflows move toward direct ribonucleoprotein delivery, researchers need transfection solutions that deliver high editing efficiency without sacrificing cell health. ProteanFect™ CRISPR RNP Transfection Kit is engineered specifically for Cas9 RNP delivery—enabling fast, scalable genome editing in primary, suspension, and other difficult cell types.
Direct RNP Delivery
High Editing Efficiency
Low Toxicity
Faster CRISPR Workflow
Choose from our range of ProteanFect™ kits optimized for different cell types and applications.
| KIT | TYPE | SPECIES / CELLS | SUPPORTED CARGO | BEST FOR | SIZES |
|---|---|---|---|---|---|
|
ProteanFect TuffCell Transfection Kit
TT300007S / M / L
|
TuffCell |
Human
Mouse
Rat
Bovine +
|
mRNA
siRNA
pDNA
|
Broad-purpose delivery across many primary cell types and hard-to-transfect lines. |
|
|
ProteanFect TuffCell Mouse Immunocyte Transfection Kit
TT300008S / M / L
|
TuffCell |
Mouse only
T cells • NK cells • B cells
|
mRNA siRNA | mRNA delivery in mouse primary immune cells. |
|
|
ProteanFect CRISPR RNP Transfection Kit
TT300009S / M / L
|
CRISPR RNP | Human | Cas9 protein + sgRNA | Precise CRISPR gene editing. |
|
|
ProteanFect CRISPR RNP Mouse Immunocyte Transfection Kit
TT300010S / M / L
|
CRISPR RNP | Mouse only | Cas9 protein + sgRNA | CRISPR editing in mouse immune cells. |
|
Available Product Kits
Choose from our range of ProteanFect™ kits optimized for different cell types and applications.
| KIT | TYPE | SPECIES / CELLS | SUPPORTED CARGO | BEST FOR | SIZES |
|---|---|---|---|---|---|
|
ProteanFect TuffCell Transfection Kit
TT300007S / M / L
|
TuffCell |
Human
Mouse
Rat
Bovine +
|
mRNA
siRNA
pDNA
|
Broad-purpose delivery across many primary cell types and hard-to-transfect lines. |
|
|
ProteanFect TuffCell Mouse Immunocyte Transfection Kit
TT300008S / M / L
|
TuffCell |
Mouse only
T cells • NK cells • B cells
|
mRNA siRNA | mRNA delivery in mouse primary immune cells. |
|
|
ProteanFect CRISPR RNP Transfection Kit
TT300009S / M / L
|
CRISPR RNP | Human | Cas9 protein + sgRNA | Precise CRISPR gene editing. |
|
|
ProteanFect CRISPR RNP Mouse Immunocyte Transfection Kit
TT300010S / M / L
|
CRISPR RNP | Mouse only | Cas9 protein + sgRNA | CRISPR editing in mouse immune cells. |
|
Decision Guide
Find Your Protocol
Question
Recommended method
Your answers
ProteanFect™ TuffCell Transfection Kit
For Human Primary & Hard-to-Transfect Cells
A non-viral, non-electroporation, non-liposomal transfection kit using engineered mammalian proteins, tailored for high-efficiency delivery into a wide range of primary cells and difficult to transfect cell lines such as immune cells, stem cells, and neuronal cells.
- ✔ Pre‑qualified Cas9 protein with NLS for nuclear entry
- ✔ Optimized RNP formation buffer for maximum stability
- ✔ Compatible with synthetic & IVT sgRNAs
- ✔ Validated in T cells, NK cells, HSCs, iPSCs, and 50+ cell types
- ✔ Simple mix‑and‑add protocol — no electroporation required
- ✔ Scalable from 96‑well to larger format
ProteanFect™ TuffCell Mouse Immunocyte Transfection Kit
For Mouse Primary Immune Cells
A non-viral, non-electroporation, non-liposomal transfection kit using engineered mammalian proteins, tailored for high-efficiency delivery in mouse primary immune cells.
- ✔ Formulation optimized for mouse immune cell biology
- ✔ High editing efficiency in mouse primary T & NK cells
- ✔ Maintains cell viability and immune function post‑edit
- ✔ Ideal for preclinical CAR‑T and immunotherapy models
- ✔ Same simple workflow as the human kit
- ✔ Compatible with mouse‑specific sgRNA designs
ProteanFect™ CRISPR RNP Transfection Kit
For Human Primary & Hard-to-Transfect Cells
Engineered mammalian proteins optimized for delivering CRISPR RNP complexes (Cas9 protein and sgRNA) into primary and hard-to-transfect cells for gene editing.
- ✔ Pre‑qualified Cas9 protein with NLS for nuclear entry
- ✔ Optimized RNP formation buffer for maximum stability
- ✔ Compatible with synthetic & IVT sgRNAs
- ✔ Validated in T cells, NK cells, HSCs, iPSCs, and 50+ cell types
- ✔ Simple mix‑and‑add protocol — no electroporation required
- ✔ Scalable from 96‑well to larger format
ProteanFect™ CRISPR RNP Mouse Immunocyte Transfection Kit
For Mouse Primary Immune Cells
Engineered mammalian proteins optimized for gene editing by efficiently transporting CRISPR RNP complexes (Cas9 protein and sgRNA) into primary mouse immune cells, including T, NK, and B cells.
- ✔ Formulation optimized for mouse immune cell biology
- ✔ High editing efficiency in mouse primary T & NK cells
- ✔ Maintains cell viability and immune function post‑edit
- ✔ Ideal for preclinical CAR‑T and immunotherapy models
- ✔ Same simple workflow as the human kit
- ✔ Compatible with mouse‑specific sgRNA designs
Successfully Transfected Cell Types
Comprehensive list of cell lines and primary cells successfully transfected with ProteanFect™
| Cell Type | Tested Cargo | Transfection Efficiency | |
|---|---|---|---|
| Primary Cells | Human T Cells |
mRNA
siRNA
RNP
|
50-100% |
| Human B Cells |
mRNA
siRNA
RNP
|
20-75% | |
| Human Natural Killer Cells |
mRNA
siRNA
RNP
|
25-75% | |
| iPSCs (Induced Pluripotent Stem Cells) |
pDNA
mRNA
siRNA
RNP
|
50-100% | |
| HSCs (Human CD34+ Hematopoietic Stem Cells) |
mRNA
siRNA
RNP
|
50-100% | |
| UC-MSCs (Umbilical Cord Mesenchymal Stem Cells) |
mRNA
siRNA
|
50-100% | |
| Human Skin Fibroblasts |
pDNA
mRNA
siRNA
|
50-100% | |
| KSL (Mouse Hematopoietic Stem Cells) |
mRNA
siRNA
|
50-100% | |
| Mouse Neurons |
pDNA
mRNA
siRNA
|
10-50% | |
| Mouse Oligodendrocytes |
pDNA
mRNA
siRNA
|
50-100% | |
| Porcine Macrophages |
mRNA
siRNA
|
50-75% | |
| Bovine Fibroblasts |
mRNA
siRNA
|
50-100% | |
| M. rosenbergii Hemocytes |
mRNA
siRNA
|
25-75% | |
| Chicken Primordial Germ Cells |
mRNA
siRNA
RNP
|
25-100% | |
| L. crocea Mesenchymal Stem Cells |
mRNA
siRNA
|
25-50% | |
| Cell Type | Tested Cargo | Transfection Efficiency | |
|---|---|---|---|
| Cell Lines | Jurkat (Human T Cells) |
pDNA
mRNA
siRNA
RNP
|
50-100% |
| MOLT-16 (Human T-ALL Cells) |
mRNA
siRNA
|
10-30% | |
| Raji (Human B Cells) |
mRNA
siRNA
|
50-100% | |
| MEC-1 (Human B Cells) |
mRNA
siRNA
|
50-100% | |
| TMD8 (Human Diffuse Large B-Cell Lymphoma Cells) |
mRNA
siRNA
|
50-100% | |
| NK-92 (Human Natural Killer Cells) |
mRNA
siRNA
|
25-75% | |
| K562 (Human Chronic Myeloid Leukemia) |
pDNA
mRNA
siRNA
RNP
|
30-100% | |
| THP-1 (Human Monocytic Cells) |
mRNA
siRNA
|
50-100% | |
| Kasumi-1 (Human Acute Myeloid Leukemia) |
mRNA
siRNA
RNP
|
50-100% | |
| MDS-L (Human Leukemia Cells) |
mRNA
siRNA
|
50-100% | |
| U937 (Human Myeloid Leukemia) |
mRNA
siRNA
|
50-75% | |
| HL-60 (Human Promyelocytic Leukemia) |
mRNA
siRNA
|
50-100% | |
| HFF (Human Fibroblasts) |
mRNA
siRNA
RNP
|
50-100% | |
| LX-2 (Human Hepatic Stellate Cells) |
pDNA
mRNA
siRNA
|
50-100% | |
| HepG2 (Human Liver Carcinoma) |
pDNA
mRNA
siRNA
RNP
|
25-75% | |
| KYSE-510 (Human Esophageal Squamous Cell Carcinoma) |
mRNA
siRNA
|
50-100% | |
| Mum2B (Human Melanoma) |
mRNA
siRNA
|
50-100% | |
| H1-hESC (Human Embryonic Stem Cells) |
pDNA
mRNA
siRNA
|
50-100% | |
| U2OS (Human Osteosarcoma) |
pDNA
mRNA
siRNA
|
50-100% | |
| HT-29 (Human Colorectal Adenocarcinoma Cells) |
pDNA
mRNA
siRNA
|
50-100% | |
| 5637 (Human Bladder Carcinoma Cells) |
pDNA
mRNA
siRNA
RNP
|
50-100% | |
| HGC-27 (Human Gastric Carcinoma Cells) |
mRNA
siRNA
|
50-100% | |
| SH-SY5Y (Human Neuroblastoma Cells) |
pDNA
mRNA
siRNA
|
50-100% | |
| U251MG Cells (Human Glioblastoma Cells) |
mRNA
siRNA
|
50-100% | |
| HEK293 (Human Embryonic Kidney Cells) |
pDNA
mRNA
siRNA
RNP
|
50-100% | |
| Neuro 2A (Mouse Neuroblastoma Cells) |
pDNA
mRNA
siRNA
|
50-100% | |
| MC38 (Mouse Colon Adenocarcinoma Cells) |
mRNA
siRNA
|
25-75% | |
| RAW264.7 (Mouse Macrophages) |
mRNA
siRNA
|
50-80% | |
| LLC (Mouse Lewis Lung Carcinoma) |
pDNA
mRNA
siRNA
|
50-100% | |
| CH12 (Mouse Lymphoma Cells) |
mRNA
siRNA
|
50-100% | |
| BV-2 (Mouse Microglial Cells) |
mRNA
siRNA
|
25-50% | |
| C2C12 (Mouse Myoblasts) |
pDNA
mRNA
siRNA
|
50-100% | |
| B16 (Mouse Melanoma Cells) |
mRNA
siRNA
|
25-75% | |
| MH-S (Mouse Macrophages) |
mRNA
siRNA
|
25-50% | |
| MODE-K (Mouse Intestinal Epithelial Cells) |
mRNA
siRNA
|
50-100% | |
| MEF (Mouse Embryonic Fibroblasts) |
pDNA
mRNA
siRNA
|
25-100% | |
| 3T3 (Mouse Embryonic Fibroblasts) |
mRNA
siRNA
|
25-50% | |
| OLN93 (Rat Oligodendrocyte Cells) |
mRNA
siRNA
|
50-100% | |
| MDBK (Bovine Kidney Epithelial Cells) |
mRNA
siRNA
|
50-100% | |
| MAC-T (Bovine Mammary Epithelial Cells) |
mRNA
siRNA
|
50-100% | |
| COS-7 (Monkey Kidney Fibroblast-like Cells) |
pDNA
mRNA
siRNA
|
50-100% | |
Transfection Protocol for mRNA per well of 96-well plate

How ProteanFect™ Compares
See how ProteanFect™ TuffCell Transfection Kit stands against other leading transfection methods in the market.
Transfection Method Comparison
Comprehensive comparison of ProteanFect™ TuffCell with other popular transfection methods.
| Feature / Metric | ProTeanFect™ TuffCell | Lipid Reagents | Electroporation |
|---|---|---|---|
| Efficiency in Primary Cells | |||
| Cell Viability | |||
| Suspension Cells (e.g., Jurkat, K562) | |||
| Cargo Flexibility | |||
| Ease of Use / Workflow | |||
| Functional Preservation | |||
| Scalability | |||
| Safety / Biocompatibility | |||
| Best Use Case | Hard-to-transfect cells where viability matters most | Routine, easy-to-transfect adherent cell lines | Short-term high-efficiency delivery in difficult cells (sacrifice viability) |
Proven Performance in the Hardest Cells
ProteanFect™ delivers high efficiency in primary and suspension cells — including T cells, NK cells, neurons, and stem cells — where lipids fail and electroporation harms viability.
Gentle Yet Powerful Delivery
Unlike harsh or toxic alternatives, ProteanFect™ maintains cell health, phenotype, and function, enabling more biologically relevant results.
Versatility Without Complexity
A simple, scalable mix-and-go system that supports a wide range of nucleic acid cargos (mRNA, siRNA, plasmids, CRISPR), making it the go-to solution for diverse applications.
Recent Citations for ProteanFect™
| No. | Journal | DOI | Cell Type | Cargo type | Product SKU |
|---|---|---|---|---|---|
| 1 | Nature Communications | https://doi.org/10.1038/s41467-025-62976-4 | Primary human CD8+ T cells | Cas9 mRNA and sgRNA | |
| 2 | Nature Cell Biology | https://doi.org/10.1038/s41556-025-01753-3 | Primary mouse CD8+ T cells | siRNA | |
| 3 | Phytomedicine | https://doi.org/10.1016/j.phymed.2025.157649 | Primary mouse CD8+ T cells | siRNA | |
| 4 | Oncogenesis | https://doi.org/10.1038/s41389-026-00600-w | Primary mouse CD8+ T cells | siRNA | |
| 5 | Nature Microbiology | https://doi.org/10.1038/s41564-025-02140-2 | Primary mouse CD4+ Treg cells | siRNA | |
| 6 | Signal Transduction and Targeted Therapy | https://doi.org/10.1038/s41392-025-02359-9 | Primary mouse CD4+ T cells | Cas9 mRNA and sgRNA | |
| 7 | Bioactive Materials | https://doi.org/10.1016/j.bioactmat.2026.01.030 | Cord blood NK cells | siRNA | |
| 8 | Nature Biotechnology | https://doi.org/10.1038/s41587-026-03007-5 | Jurkat cells | RNP (Cas9 protein and sgRNA) | |
| 9 | Science Advances | https://doi.org/10.1126/sciadv.adw7471 | Jurkat cells | Plasmid | |
| 10 | Journal of Advanced Research | https://doi.org/10.1016/j.jare.2025.11.018 | Jurkat cells | Plasmid | |
| 11 | Nature Genetics | https://doi.org/10.1038/s41588-025-02407-8 | THP-1 cells | siRNA | |
| 12 | Phytomedicine | https://doi.org/10.1016/j.phymed.2026.158382 | Primary mouse CD8+ T cells | siRNA | |
| 13 | Biochemical and Biophysical Research Communications | https://doi.org/10.1016/j.bbrc.2026.153918 | Primary mouse T cells | mRNA | |
| 14 | Nature Communications | https://doi.org/10.1038/s41467-026-74164-z | Jurkat cells | plasmid | |
| 15 | Cancer Immunology, Immunotherapy | https://doi.org/10.1007/s00262-026-04387-y | Mouse ascitic CD19+ B cells | siRNA | |
| 16 | Advanced Science | https://doi.org/10.1002/advs.202520693 | Jurkat cells | plasmid | |
| 17 | The Journal for ImmunoTherapy of Cancer | https://doi.org/10.1136/jitc-2025-014179 | Primary human CD8+ T cells | plasmid | |
| 18 | European Journal of Immunology | https://doi.org/10.1002/eji.70173 | Primary mouse CD4+ T cells | Cas9 mRNA and sgRNA | |
| 19 | Cell Reports | https://doi.org/10.1016/j.celrep.2026.117220 | Primary mouse T cells/Primary human T cells | siRNA and mRNA | / |
| 20 | Food Science and Human Wellness | https://doi.org/10.26599/FSHW.2026.9251013 | HEK293T | plasmid | |
| 21 | Theranostics | https://doi.org/10.7150/thno.131793 | Primary human Treg cells | Cas9 protein and sgRNA |
Recent Citations for ProteanFect™
|
1 H2A.Z primes an epigenetic landscape for memory CD8+ T cell recall response Published in Nature Communications , using TT300007S |
View Publication |
|
2 CD160 dictates anti-PD-1 immunotherapy resistance by regulating CD8+ T cell exhaustion in colorectal cancer Published in Nature Cell Biology , using TT300008S |
View Publication |
|
3 Ginsenoside F3 alleviates T cell exhaustion via RIPOR2-mediated immunometabolic reprogramming to potentiate anti-PD-1 therapy Published in Phytomedicine , using TT300008S |
View Publication |
|
4 Fatty acid uptake mediated by FABP4 promotes the formation of CD8+T cell senescence through lipid peroxidation in the adipocyte-rich microenvironment of Ovarian Cancer Published in Oncogenesis , using TT300008S |
View Publication |
|
5 Mycobacterium tuberculosis-derived linoleic acid increases regulatory T cell function to promote bacterial survival within macrophages Published in Nature Microbiology , using TT300008S |
View Publication |
|
6 High fructose consumption aggravates inflammation by promoting effector T cell generation via inducing metabolic reprogramming Published in Signal Transduction and Targeted Therapy , using TT300008S |
View Publication |
|
7 Cord blood natural killer cell-derived extracellular vesicles inhibit Zika virus infectivity through ITGB2/perforin-mediated envelope disruption in vitro and in vivo Published in Bioactive Materials , using TT300007S |
View Publication |
|
8 Single-round evolution of RNA aptamers with GRAPE-LM Published in Nature Biotechnology , using TT300009S |
View Publication |
|
9 Phosphorylation of shiftless is important for inhibiting the programmed −1 ribosomal frameshift Published in Science Advances , using TT300007S |
View Publication |
|
10 Single-nucleus RNA sequencing illuminates a functional analog of lymphoid organ in crustacean Published in Journal of Advanced Research , using TT300007S |
View Publication |
|
11 Spatially resolved multi-omics of human metabolic dysfunction-associated steatotic liver disease Published in Nature Genetics , using TT300007S |
View Publication |
|
12 Quercetin targets BCAT1 to potentiate CD8+ T cell immunity by rewiring branched-chain amino acid metabolism against colorectal cancer metastasis Published in Phytomedicine , using TT300008S |
View Publication |
|
13 A click-compatible BmTyr platform for biotin-free proximity labeling and subcellular proteome profiling in primary T cells Published in Biochemical and Biophysical Research Communications , using TT300008S |
View Publication |
|
14 Optimization of IS621 recombinase/bridge RNA-directed recombination for precise insertion of large DNA fragments in human cells Published in Nature Communications , using TT300007S |
View Publication |
|
15 Promoting APC function of B cells via reprogramming the fatty acid metabolism enhances anticancer immunity in metastatic ovarian cancer Published in Cancer Immunology, Immunotherapy , using TT300007S |
View Publication |
|
16 NUDT21 Drives T-Cell Acute Lymphoblastic Leukemia Through Dual Regulation of Alternative Polyadenylation and Transcriptional Activation Published in Advanced Science , using TT300007S |
View Publication |
|
17 Hyaluronic acid-CD44 signaling defines therapeutic resistance and immunosuppressive microenvironment in peritoneal metastasis of gastric cancer Published in The Journal for ImmunoTherapy of Cancer , using TT300007S |
View Publication |
|
18 Oleic Acid Promotes Treg Cell Differentiation via Autophagy Induction and Ameliorates DSS-Induced Colitis Published in European Journal of Immunology , using TT300008S |
View Publication |
|
19 Bach2 antagonizes leukotriene B4-Ltb4r1-JunB signaling to constrain Tfh13 cell differentiation |
View Publication |
|
20 Ganoderic Acid A Alleviates NAFLD by Facilitating PPARα-CPT1A Complex and Enhancing Gut Microbiota Diversity Published in Food Science and Human Wellness , using TT300007S |
View Publication |
Recent Citations for ProteanFect™
|
1 H2A.Z primes an epigenetic landscape for memory CD8+ T cell recall response Published in Nature Communications |
PubMed: test |
|
2 CD160 dictates anti-PD-1 immunotherapy resistance by regulating CD8+ T cell exhaustion in colorectal cancer Published in Nature Cell Biology |
View Publication |
|
3 High fructose consumption aggravates inflammation by promoting effector T cell generation via inducing metabolic reprogramming Published in Signal Transduction and Targeted Therapy |
View Publication |
|
4 Single-nucleus RNA sequencing illuminates a functional analog of lymphoid organ in crustacean Published in Journal of Advanced Research |
View Publication |
|
5 Mycobacterium tuberculosis-derived linoleic acid increases regulatory T cell function to promote bacterial survival within macrophages Published in Nature Microbiology |
View Publication |
|
6 Spatially resolved multi-omics of human metabolic dysfunction-associated steatotic liver disease Published in Nature Genetics |
View Publication |
|
7 Single-round evolution of RNA aptamers with GRAPE-LM Published in Nature Biotechnology |
View Publication |