Hi, I'm back again from my holidays. Which wouldn't justify a mail to this list; however, I got thrown out automatically because of a misconfiguration (the spamfilter didn't really delete all these virus alerts, the mailbox flowed over, and all mail bounced). I have subscribed again, but have doubt that it really works again now. Bye, Frank -- Frank Küster, Biozentrum der Univ. Basel Abt. Biophysikalische Chemie