Release Details

CARMIEL, Israel, Dec. 13, 2011 (GLOBE NEWSWIRE) -- Protalix BioTherapeutics, Inc. (NYSE Amex:PLX) (TASE:PLX), announced today that Dr. David Aviezer, the Company's President and Chief Executive Officer, will present at the Oppenheimer 22nd Annual Healthcare Conference on Wednesday, December 14, 2011 at 3:55 PM ET. The conference will be held at The Waldorf-Astoria Hotel in New York City on December 13-14, 2011.

A webcast of the live presentation will be available at www.protalix.com on the event calendar page. A replay will be archived and available after the conference for 30 days.

About Protalix

Protalix is a biopharmaceutical company focused on the development and commercialization of recombinant therapeutic proteins expressed through its proprietary plant cell based expression system, ProCellEx(TM). Protalix's unique expression system presents a proprietary method for developing recombinant proteins in a cost-effective, industrial-scale manner in an environment free of mammalian components and viruses. Protalix's lead compound, taliglucerase alfa, an enzyme replacement therapy for the treatment of Gaucher disease, completed phase III development. To date, marketing applications have been submitted for taliglucerase alfa in the United States, the European Union, Brazil, Israel and Australia. Protalix's development pipeline also includes the following product candidates: PRX-102, a modified version of the recombinant human alpha-GAL-A protein for the treatment of Fabry disease; PRX-105, a pegylated recombinant human acetylcholinesterase in development for several therapeutic and prophylactic indications, a biodefense program and an organophosphate-based pesticide treatment program; an orally-delivered glucocerebrosidase enzyme that is naturally encased in carrot cells, also for the treatment of Gaucher disease; pr-antiTNF, a similar plant cell version of etanercept (Enbrel(TM)) for the treatment of certain immune diseases such as rheumatoid arthritis, juvenile idiopathic arthritis, ankylosing spondylitis, psoriatic arthritis and plaque psoriasis; and others.

Forward Looking Statements

To the extent that statements in this press release are not strictly historical, all such statements are forward-looking, and are made pursuant to the safe-harbor provisions of the Private Securities Litigation Reform Act of 1995. The terms "anticipate," "believe," "estimate," "expect" and "intend" and other words or phrases of similar import are intended to identify forward-looking statements. These forward-looking statements are subject to known and unknown risks and uncertainties that may cause actual future experience and results to differ materially from the statements made. The statements in this release are valid only as of the date hereof and we disclaim any obligation to update this information.

CONTACT: Investor Contact
         Marcy Nanus
         The Trout Group, LLC
         646-378-2927
         mnanus@troutgroup.com

         Media Contact
         Jennifer Conrad or Douglas MacDougall
         MacDougall Biomedical Communications
         781-235-3060
         jconrad@macbiocom.com