Dear Louise, I tried creating a peptide with some ASN in both versions 2.1.5 and 2.2.1, as they live on my computer. Going into M:Molecule:Atom Browser, I get both Hd2a and Hd2b for my ASN. If I add stereospecific and ambiguous names (in Options) I get in addition Hd21, Hd22, and Hd2*. Could you ell us some more details: Which version are you using? What are you doing when oyu see this problem? What does the screen show? Are there any error messages being written out in the command line window? Yours, Rasmus --------------------------------------------------------------------------- Dr. Rasmus H. Fogh Email: [log in to unmask] Dept. of Biochemistry, University of Cambridge, 80 Tennis Court Road, Cambridge CB2 1GA, UK. FAX (01223)766002 On Tue, 24 May 2011, Louise Thorstholm wrote: > I only got one delta proton, anyone know how to change it? > > Cheers > Louise >