Dear All, Looking to refine a beta-peptide structure (<2 A resolution). Any advice on use of Refmac, Phenix, SHELX for this, are they in the dicionary? Thanks a lot. Richard -- Asst. Prof. in Chemistry ===== Yale University PO Box 208107 New Haven, CT 06520-8107 Tel: +1 203 432 9576 Fax: +1 203 432 6144 www.baxterlab.org =====