After this long discussion about whether or not it was unbalancing, shall I mail my patches to the group, so you can check for yourself? or upload it to ifi.uio.no? what is the procedure? Frits Frits Daalmans OIO Conformational Analysis Gorlaeus Laboratoria Leiden, The Netherlands E-mail: frits@chemde4.leidenuniv.nl Tel: [+31] (0)71-5274505