15% Off Proteins from Trusted Suppliers — Limited Time
Each brand brings a distinct strength — from rapid-turnaround cytokines to transmembrane proteins and animal-injection-grade bioactives. All 15% off with code PT15OFF.
ISO 9001:2015 · Wuhan Fine Biotech · 60+ countries
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Est. 2012 · California-based · Cell assay specialist
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Est. 2013 · Wuhan / Denver · 70+ countries
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18+ years · Largest catalog · 5 expression systems
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28,700+ SCI citations · Nature · Cell · Immunity
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Choose the Right Expression Platform
Across all five brands, proteins span every major expression system — matched to your application's requirements for post-translational modifications, bioactivity, and purity.
E. coli
High yield, cost-effective, fast turnaround. Ideal for non-glycosylated proteins & standards.
Yeast
Simple glycosylation, high yield, eukaryotic folding. Good for secreted proteins.
Baculovirus / Insect
Post-translational modifications, high-level expression of complex eukaryotic proteins.
Mammalian (HEK293 / CHO)
Native-like PTMs, highest bioactivity. Preferred for therapeutic-grade & functional studies.
In Vitro / Cell-Free
Cusabio exclusive. For transmembrane, toxic, or very large proteins difficult to express in cells.
Proteins for Every Research Area
All categories covered — 15% off applies across the board with code PT15OFF.
Three Steps to Your 15% Discount
Apply code PT15OFF at checkout — valid on all proteins from these five brands.
Browse by brand, target, species, or expression system. No minimum order required.
Add any qualifying protein from FineTest, Abbkine, ELK, Cusabio or Elabscience.
Use code PT15OFF to deduct 15%. PO & quote also accepted.
Need Volume Pricing or a Bulk Order?
For large-scale studies, multi-protein panels, or institutional purchasing, contact our team for a custom quote.