KACTUS | Quality Recombinant Proteins and Enzymes

We deliver high-quality recombinant proteins and enzymes that accelerate therapeutic development...

...offering a comprehensive catalog where versatility meets quality

catalog products

Produced & Tested In-House

Designed, expressed, and verified by us. Quality proteins from end to end.

Tailored Expression Systems

Proteins tested in 8-16 various expression conditions to determine the optimal settings.

High Purity & Bioactivity

Rigorous quality control testing for purity and bioactivity using HPLC, SPR, ELISA, etc.

Next-Day Shipping from Boston, MA

Catalog products shipped next-day from our inventory center in Boston, MA.

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Multi-Pass Transmembrane Proteins

VLP-Displayed Proteins

Full-length, mammalian expressed membrane proteins displayed on virus-like particles (VLPs) for enhanced immunogenicity

Nanodisc-Displayed Proteins

Detergent-free extraction copolymer nanodiscs displaying full-length membrane proteins in their native conformation

MHC Monomers & Tetramers

Class I & Class II MHC-Peptide Complexes

MHC-peptide

MHC Monomers & Tetramers from mammalian & E. coli expression systems

Peptide-ready MHC

Load your own peptide in-house for a custom monomer or tetramer

Biotinylation or fluorescent label

Biotinylated MHC

Biotinylated MHC monomers or tetramers for TCR screening and more

Fluorescent MHC

Identify antigen-specific T Cells using FACS

GMP Gene Editing Enzymes

Cas9 Protein

Off-the-shelf wild-type Cas9 protein with NLS optimization, batch consistency, and high editing activity.

AccuBase® Base Editor

First commercially available base editor. Off-the-shelf editor engineered for near-zero off-target effects and high editing activity

Drug Discovery Collections

Immune Checkpoint Proteins

Immune Checkpoint Proteins

CD3 Proteins

Fc Receptor Proteins

Fc Receptor Proteins

Integrin Proteins

Integrin Proteins

Chimeric Antigen Receptor T Cell Therapy (CAR-T) Proteins

Chimeric Antigen Receptor T Cell Therapy (CAR-T) Proteins

Cadherin Proteins

Cadherin Proteins

Trending Products

New Products This Month

Biotinylated Human GIPR Protein-Nanodisc (GIP-HM14RNB)

Biotinylated Human/Mouse/Rat GDF-8 Protein (GDF-HM008B)

Biotinylated Human OSMR beta Protein (OSM-HM001B)

Biotinylated Human CDH6/Cadherin 6 Protein (CDH-HM406B)

Upcoming Events

Festival of Biologics US

April 23-25, 2025

San Diego, California

Booth #1123

AACR Annual Meeting

April 27-30, 2025

Chicago, Illinois

Booth #3935

PEGS Summit

May 12-16, 2025

Boston, MA

Booth #801

News & Articles

For Better Symptom Relief: Targeted Therapy for Asthma

Apr 15, 2025

For Better Symptom Relief: Targeted Therapy for Asthma

The Rise of Allogeneic Cell Therapies: Strategies, Challenges, and Clinical Advances

Apr 8, 2025

The Rise of Allogeneic Cell Therapies: Strategies, Challenges, and Clinical Advances

At the Crossroads of Metabolic and Cancer Therapeutics — GDF15

Apr 1, 2025

At the Crossroads of Metabolic and Cancer Therapeutics — GDF15

Ensuring Safe and Effective Gene Therapy with Precise AAV Capsid Quantification

Mar 25, 2025

Ensuring Safe and Effective Gene Therapy with Precise AAV Capsid Quantification

Cracking KRAS: How TCR-T and TCR-Mimic Antibodies Are Changing KRAS Mutant Cancers

Mar 18, 2025

Cracking KRAS: How TCR-T and TCR-Mimic Antibodies Are Changing KRAS Mutant Cancers

Optimizing Large-scale Circular RNA Production Process with KACTUS Engineered RNase R

Mar 13, 2025

Optimizing Large-scale Circular RNA Production Process with KACTUS Engineered RNase R

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KACTUS | Quality Recombinant Proteins and Enzymes

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