Notification of voting rights transmitted by euro adhoc. The issuer is
  responsible for the content of this announcement.

Person/company obliged to make the notification:
Name:    Hans Dieter Rössler
State:   Germany

Company data:
Name:    curasan AG
Address: Lindigstrasse 4, 63801 Kleinostheim
Place:   Kleinostheim
State:   Deutschland

25.04.2007

On April 25, 2007, Mr. Hans Dieter Rössler, Germany, informed us 
according to article 21, section 1 WpHG that on April 24, 2007, due 
to a redemption of a loan of 575,000 shares, his voting rights on 
curasan AG (ISIN DE 000 549 453 8 / WKN 549453), 63801 Kleinostheim, 
Germany exceeded the threshold of 30 % and amounted to 32.69 % 
(2,215,000 voting rights) on that day.

end of announcement                               euro adhoc 25.04.2007 18:16:38

Further inquiry note:

Branche: Biotechnology
ISIN: DE0005494538
WKN: 549453
Index: CDAX, Classic All Share, Prime All Share
Börsen: Frankfurter Wertpapierbörse / regulated dealing/prime
standard
Börse Berlin-Bremen / free trade
Hamburger Wertpapierbörse / free trade
Baden-Württembergische Wertpapierbörse / free trade
Börse Düsseldorf / free trade
Niedersächsische Börse zu Hannover / free trade
Bayerische Börse / free trade