Quanta (accelrys) had a feature for this.
> Dear all,
> I am looking for a program or webtool that can create canonical
> nucleic acid helices (like B-form, A-form...) as well as a program
> that can calculate helical parameters from a given helix.
> Thanks in advance,
Professor James Whisstock
NHMRC Principal Research Fellow / Monash University Senior Logan fellow
Department of Biochemistry and Molecular Biology
Monash University, Clayton Campus, PO Box 13d, VIC, 3800, Australia.
+613 9905 3747 (Phone)
+613 9905 4699 (Fax)
+61 418 170 585 (Mobile)