Hi, has anyboby experiences in the AM1/PM3 calculation of oligopeptides and the correlation of calculated spectra with experimental data especially for intra- and intermolecular hydrogen bonding ? Andreas Jabs M.-Luther-University Department of Chemistry Theoretical Chemistry Group Weinbergweg 16 O-4020 Halle/Saale PF 8 e-mail: c=de;a=dbp;p=uni-halle;o=chemie;s=jabs