VANCOUVER, BRITISH COLUMBIA--(MARKET WIRE)--Jul 19, 2006 -- Protiva Biotherapeutics Inc. said today that based upon the information it has to date it will withhold its consent and pursue the law suit it filed against Inex Pharmaceuticals Corporation (TSX:IEX.TO - News) in March of this year to prevent an improper transfer of Protiva’s agreements with Inex and other assets into a new company called Tekmira Pharmaceuticals Corporation (“Tekmira”).