Cayman Chemical Item Number 10340


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Source: Recombinant N-terminal His-tagged GRFT, purified from E. coli · Mr: 14.6 kDa · Griffithsin (GRFT), is a lectin isolated from Griffithsia sp. with anti-HIV activity at subnanomolar concentrations.1 GRFT activity is glycosylation-dependent and acts by binding to glycoproteins gp41, gp120, and gp160 on the viral envelope, blocking the virus from binding to CD4 receptor-expressing cells in the host. It also prevents cell fusion between infected and uninfected cells, further inhibiting the spread of HIV in the body. GRFT functions as a homodimer, with each monomer containing three carbohydrate binding sites.1,2 GRFT unique anti-viral activity is of interest for use in microbicide production to stop transmission of HIV through sexual contact. It has also been shown to have inhibitory effects with SARS-related coronavirus; where GRFT binding to the SARS-CoV S protein can prevent viral entry and reduce viral load in succeeding rounds of infection.3

1. Mori, T., O'Keefe, B.R., Sowder, R.C., et al. Isolation and characterization of griffithsin, a novel HIV-inactivating protein, from the red alga Griffithsia sp.. J Biol Chem 280(10) 9345-9353 (2005).

2. Ziólkowska, N.E., O'Keefe, B.R., Mori, T., et al. Domain-swapped structure of the potent antiviral protein griffithsin and its mode of carbohydrate binding. Structure 14 1127-1135 (2006).

3. O'Keefe, B.R., Giomarelli, B., Barnard, D.L., et al. Broad spectrum in vitro activity and in vivo efficacy of the antiviral protein griffithsin against emerging viruses of the family Coronaviridae. J Virol (2009).

  • GRFT
UniProt Accession № P84801
Formulation 50 mM sodium phosphate pH 7.2, containing100 mM sodium chloride, 2.5 mM DTT, and 20% glycerol
Purity ≥95%
Stability 9 months
Storage -80°C
Shipping Dry ice in continental US; may vary elsewhere

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Size Price Quantity Subtotal
25 µg $92.00 $0.00
50 µg $175.00 $0.00
100 µg $330.00 $0.00
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Cart Total $0.00

Pricing updated 2015-07-31. Prices are subject to change without notice.

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Warning This product is not for human or veterinary use.

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Cayman Chemical Company regularly evaluates our shipping methods to ensure product stability is maintained and our corporate environmental impact is minimized. Products selected for review are evaluated and shipping methods are certified by our Scientists. While occasionally our method of shipping a product may change, rest assured the shipping conditions on all Cayman Chemical products have been reviewed and validated.

Upon receipt, it is important to check the storage requirements of your products and place them at the appropriate temperature. Products shipped without ice may require frozen storage for long term stability.

Cayman Chemical was formed over thirty years ago by demonstrating the value of naturally growing gorgonian corals as a renewable, economically viable source of prostaglandins. Today we operate our business knowing that we owe our start to the renewable resources our environment had provided. As Cayman Chemical continues to grow we consistently evaluate our business processes to ensure we are operating at the highest environmental standards.

Cayman Chemical

1180 East Ellsworth Road

Ann Arbor, Michigan 48108 USA


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