New Insights into Novel Mechanisms of Action of Genmab's HuMax-EGFr


Summary: Genmab has announced new insights into the novel mechanisms of action  
of HuMax-EGFr (zalutumumab).                                                    

Copenhagen, Denmark; March 12, 2007 - Genmab A/S (CSE: GEN) announced today new 
insights into the novel mechanisms of action of its antibody HuMax-EGFr(TM)     
(zalutumumab).  By using Protein Tomography(TM), a relatively new technology    
which uses an electron microscope to view the three dimensional structure of    
proteins on the surface of cells, HuMax-EGFr was shown to lock the EGF receptor 
in an inactive conformation which prevents receptor activation and the binding  
of growth factors.  Furthermore, HuMax-EGFr was shown to inhibit EGF receptor   
signaling by preventing receptor dimerization, the pairing of two receptor      
molecules which starts the signaling cascade. All of these mechanisms have the  
potential to interfere with cancer cell growth.                                 

“Coupled with previous findings that HuMax-EGFr is able to induce potent ADCC   
and block growth factor binding to EGF receptors, these studies have given us   
greater insight into the novel way HuMax-EGFr works,” said Lisa N. Drakeman,    
Ph.D., Chief Executive Officer of Genmab.                                       

These data will be presented by Genmab and Sidec Technologies AB, at the 3rd    
Novel Solution Seminar for Drug Creation and Development in Tokyo, Japan on     
March 12 and in Osaka, Japan on March 14, 2007.                                 

About Genmab A/S                                                                
Genmab A/S is a biotechnology company that creates and develops human antibodies
for the treatment of life-threatening and debilitating diseases. Genmab has     
numerous products in development to treat cancer, infectious disease, rheumatoid
arthritis and other inflammatory conditions, and intends to continue assembling 
a broad portfolio of new therapeutic products. At present, Genmab has multiple  
partnerships to gain access to disease targets and develop novel human          
antibodies including agreements with Roche and Amgen. A broad alliance provides 
Genmab with access to Medarex, Inc.'s array of proprietary technologies,        
including the UltiMAb(R) platform for the rapid creation and development of     
human antibodies to virtually any disease target. In addition, Genmab has       
developed UniBody(TM), a new proprietary technology that creates a stable,      
smaller antibody format.  Genmab has operations in Europe and the US. For more  
information about Genmab, visit www.genmab.com.                                 

This press release contains forward looking statements. The words “believe”,    
“expect”, “anticipate”, “intend” and “plan” and similar expressions identify    
forward looking statements. Actual results or performance may differ materially 
from any future results or performance expressed or implied by such statements. 
The important factors that could cause our actual results or performance to     
differ materially include, among others, risks associated with product discovery
and development, uncertainties related to the outcome and conduct of clinical   
trials including unforeseen safety issues, uncertainties related to product     
manufacturing, the lack of market acceptance of our products, our inability to  
manage growth, the competitive environment in relation to our business area and 
markets, our inability to attract and retain suitably qualified personnel, the  
unenforceability or lack of protection of our patents and proprietary rights,   
our relationships with affiliated entities, changes and developments in         
technology which may render our products obsolete, and other factors. Genmab is 
not under an obligation to up-date statements regarding the future following the
publication of this release; nor to confirm such statements in relation to      
actual results, unless this is required by law.                                 

Genmab(R); the Y-shaped Genmab logo(R); HuMax(R); HuMax-CD4(R); HuMax-EGFr(TM); 
HuMax-Inflam(TM); HuMax-CD20(TM); HuMax-TAC(TM); HuMax-HepC(TM), HuMax-CD38(TM);
HuMax-ZP3(TM); and UniBody(TM) are all trademarks of Genmab A/S.                
UltiMAb(R) is a trademark of Medarex, Inc.                                      

Contact: Helle Husted, Sr. Director, Investor Relations, T: +45 33 44 77 30, M: 
+45 25 27 47 13, E: hth@genmab.com                                              
                                                                                
Stock Exchange Release no. 10/2007

Attachments

10 humax-egfr mechanism of action_120307_uk.pdf