XL TechGroup, Inc. 07 February 2008 Press Release 7 February 2008 XL TechGroup, Inc. ('XL TechGroup' or 'the Company') QuoNova - promising early-stage results in inhibiting biofilm formation by MRSA strains and fungal organisms XL TechGroup (AIM: XLT), the creator of companies that solve identified, global unmet market needs, is pleased to advise that its 88.7% owned company QuoNova LLC has generated preliminary in-vitro data indicating high efficacy of selected Quorum Sensing Blockers ('QSB') in inhibiting biofilm formation by MRSA (methicillin-resistant Staphylococcus aureus) strains and fungal organisms such as Candida. QuoNova was founded in December 2006 and is the fifth portfolio company of XL TechGroup. QuoNova produces safe, efficacious, anti-virulence agents in the global fight against infection and damage caused by microbial biofilms. QuoNova's business strategy is to develop and commercialize its proprietary QSB platform to address unmet needs in several multiple multi-billion dollar markets including therapeutics, medical devices, consumer care, agriculture and several industrial applications. QuoNova has optimized its proprietary QSB technology to obtain small molecules with a broad activity profile that are effective against multiple pathogenic Gram-positive and Gram-negative bacterial strains as well as fungi. These promising results, which have been confirmed independently and are the subject of continuing research, further underscore the potential of QuoNova's QSBs in combating the detrimental effects of biofilms, especially in clinical environments, where mixed microbial communities predominate. MRSA bacteria (hospital and community acquired) cause increasing healthcare problems due to their resistance against most conventional antibiotic therapies. Importantly, QuoNova's QSB technology is an anti-virulence approach, which shows potential to prevent the consequences of infection from such drug-resistant bacteria, without inducing resistance itself. QuoNova has recently demonstrated the efficacy of its QSB technology in a predictive animal model where QSBs significantly reduced the ability of clinically relevant bacteria to colonize secondary burn wounds. In addition, a marked synergy with Silver Sulfadiazine, a commonly used antibacterial preparation, has been observed. John Scott, CEO of XL TechGroup, commented: 'We are pleased with QuoNova's progress towards developing its disruptive QSB anti-virulence technology into a powerful new product against major drug-resistant micro-organisms. These results significantly expand the original activity spectrum of its QSB platform to include MRSA and Candida strains, reflecting wider application potential in areas of significant unmet needs.' - Ends - For further information: XL TechGroup Inc. Dr. John Scott, CEO / Harold Gubnitsky, EVP Tel: +1 321 409 7403 [email protected] Chris Munden, Director of Investor Relations Tel: +44 (0) 20 7398 7720 [email protected] www.xltechgroup.com Nomura Code Securities Richard Potts, Corporate Finance Tel: +44 (0) 20 7776 1200 www.nomuracode.com XL TechGroup media enquiries: Abchurch Communications Heather Salmond / Gareth Mead Tel: +44 (0) 20 7398 7700 [email protected] www.abchurch-group.com NOTES TO EDITORS About QuoNova QuoNova was founded in December 2006 and is the fifth portfolio company of XL TechGroup. QuoNova produces safe, efficacious, anti-virulence agents in the global fight against infection and damage caused by microbial biofilms. QuoNova's business strategy is to develop and commercialize its proprietary Quorum Sensing Blocker ('QSB') platform and introduce a disruptive paradigm of 'smart microbial control'. QuoNova is targeting multiple multi-billion dollar markets including therapeutics, medical devices, consumer care, agriculture and several industrial applications. Micro-organisms use chemical signal molecules to communicate and recognize population density (Quorum Sensing) in order to organize their social behaviour, and co-ordinate the production of virulence factors, such as the release of toxins and biofilm formation. Biofilms are complex matrices produced by colonies of micro-organisms, and are very difficult to eradicate as they protect themselves against the immune system or conventional treatments such as antibiotics or biocides. In the healthcare environment they contribute significantly to complications in lung disease and wound healing, to medical device-associated infections as well as to dental plaque and contact lens-associated infection. In the home and in industrial processes they are a major cause of contamination, corrosion and efficiency reductions. QuoNova's QSB technology disrupts microbial communication systems and by so doing inhibits toxin production, prevents biofilm formation and promotes degradation of already established biofilms. Moreover, research to date indicates that QuoNova's QSB compounds are non-toxic and safe. QSB molecules employ an anti-virulence approach and do not kill micro-organisms, but instead influence their life style to maintain or return them to a state where they can be removed by intrinsic control mechanisms such as the immune system or by treatments much less aggressive than those currently available. This should significantly reduce or eliminate the processes that lead to the development of drug resistant organisms, and differentiates QSBs substantially from conventional antimicrobial approaches. QSB molecules will therefore initiate a new era in preventing the effects of microbial colonization, capable of overcoming the decreasing effectiveness of conventional treatments against biofilms and multi-resistant pathogens. For further information, see www.quonova.com About XL TechGroup XL TechGroup is in the business of significant value creation. Working with major international corporate and technology partners such as AES, Procter & Gamble and leading universities, XL TechGroup first identifies global unmet market needs and then targets and exploits these by the systematic creation of successful, disruptive technology businesses. These new companies are built from scratch, and are then managed, developed and funded by XL TechGroup through to the point of a trade sale or a stock market listing. XL TechGroup's unique and proven methodology selects the best opportunities in order to create one-to-two new companies annually, where each company is expected to achieve a realisable valuation of at least US$400 million within four years from its creation. It is XL TechGroup's aim to deliver significant shareholder distributions at the final exit from each company or from other liquidity events. XL TechGroup's companies to date are: • PetroAlgae LLC (www.petroalgae.com) • TyraTech Inc. (AIM: TYR, www.tyratech.com) • DxTech LLC (www.dxtech.com) • QuoNova LLC (www.quonova.com) • AgCert International plc (LSE: AGC, www.agcert.com) XL TechGroup has also established GenXL LLC as a joint venture to capture the value of those prospects that do not fully meet XL TechGroup's US$400 million, four year criteria but still demonstrate considerable potential worth. Over and above XL TechGroup's core business model, GenXL is reviewing a significant flow of opportunities from both XL TechGroup and GEN3 in order to generate new companies, standalone product lines and technology licensing opportunities or an appropriate mix of these. For further information, see www.xltechgroup.com. This information is provided by RNS The company news service from the London Stock Exchange