We deliver high-quality recombinant proteins and enzymes that accelerate therapeutic development...
...offering a comprehensive catalog where versatility meets quality
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.
Target Antigens for Drug Discovery
Bioactive target antigens for drug discovery campaigns.
Proteins for Drug Discovery
Gene Editing Products
GMP-Grade gene editing enzymes and AAV Titration ELISA Kits.
Gene Editing Enzymes
Multi-Pass Transmembrane Proteins
MHC Monomers & Tetramers
MHC-Peptide Complexes
GMP Gene Editing Enzymes
Trending Products
AAV Titration ELISA Kits
Quantification of AAV capsids for serotypes 2, 5, 6, 8, or 9 with high specificity to individual AAV serotypes, high sensitivity, and a broad linear range.
AccuBase® Base Editor
GMP-Grade. Precise DNA cytosine base editor with minimal off-target effects, creating C->T mutations for gene knockout without DNA breaks.
CD19 Proteins
Mammalian-expressed human CD19 proteins with high monomer rates. Various spcies and fluorescent options. In-stock catalog products.
Upcoming Events
AET, US
December 14-17, 2025
San Diego, CA
Booth #311
PepTalk
January 20-22, 2026
San Diego, CA
Booth #508
Festival of Biologics, USA
March 4-5, 2026
San Diego, CA
Booth #317
Our Valued Partners
60 Hickory Drive
Waltham, MA 02451
United States
KACTUS: Recombinant Proteins and Enzymes