High-purity recombinant antigensfor antibody discovery
RootcareBio supplies research-grade immune checkpoint proteins, CD antigens and growth factors — each lot QC-verified for purity, endotoxin and bioactivity, with Datasheet, COA and MSDS one click away.
Immune Checkpoint
5 productsPD-1/PD-L1/PD-L2, CTLA-4, LAG-3 and next-generation checkpoint receptors.
CD Antigen
6 productsB-cell, T-cell and plasma-cell markers for immunotherapy development.
Cytokine
6 productsBioactive TNF, IL and alarmin cytokines with verified trimer/dimer assembly.
Growth Factor & Receptor
9 productsAngiogenesis factors, RTK ectodomains and cytokine receptors for ligand-blocking assays.
Tumor-Associated Antigen
2 productsADC- and bispecific-ready targets: TROP-2, DLL3 and clinically validated oncology antigens.
Specialty Antigens
10 productsComplement, coagulation, bone, metabolic and adhesion targets beyond the mainstream.
Featured antigens
Best-studied targets, ready to ship.
AG-1001-HU-HIS In StockAG-1002-HU-HIS In StockAG-1018-HU-HIS In StockQuality is the product
Antibody programs fail on bad reagents long before they fail on biology. We hold every lot to the same four commitments.
Purity you can trust
Every lot is verified by SDS-PAGE and SEC-HPLC, with full QC documentation available for download.
Low endotoxin
Manufactured and purified under low-endotoxin conditions, suitable for cell-based and in vivo research.
Bioactivity verified
Functional assays — binding ELISA, SPR/BLI or cell-based potency — accompany every product family.
Fast global shipping
Lyophilized, temperature-controlled formats ship worldwide with tracking within days.
Need a target we don't list?
Custom recombinant antigen expression in HEK293 or E. coli — from gene synthesis to purified, QC-verified protein in 3–5 weeks. Tell us the target, we'll come back with a proposal and quote.